JPH10116558A - Transfer sheet for forming electrodes of plasma display panel and method of forming electrodes - Google Patents

Abstract

(57) [Problem] To provide a transfer sheet and an electrode forming method for forming an electrode capable of high display quality even in a high definition or large area plasma display panel. SOLUTION: A transfer sheet having a photosensitive black conductive paste layer containing a black pigment on a transfer support and a photosensitive black conductive paste layer containing a black pigment on the transfer support is provided. Using a transfer sheet having a conductive paste layer and a transfer sheet having a photosensitive conductive paste layer on a transfer support, a photosensitive black conductive paste layer and a photosensitive conductive layer are formed on an insulating substrate having transparent electrodes. The conductive paste layers are transferred, exposed and developed, and then fired to form electrodes having a two-layer structure of a black conductive layer and a main conductive layer.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer sheet for forming an electrode of a plasma display panel and a method of forming the electrode, and more particularly to a plasma display panel for easily forming a bus electrode for reducing the resistance of a transparent electrode. And a method of forming an electrode.

[0002]

2. Description of the Related Art In recent years, plasma display panels have been developed. The plasma display panel includes a DC plasma display panel and an AC plasma display panel. Both display panels use a plasma discharge in a discharge space between an electrode formed on the front plate and an electrode formed on the back plate so as to be orthogonal to the electrode. And a color display is performed by causing the phosphor applied on the inner surface of the discharge space to emit light by ultraviolet rays generated by the gas discharge.

[0003]

Conventionally, an electrode (display electrode) formed on a front plate is made of indium tin oxide (IT).
O) and the like, and the transparent electrode has a higher electric resistance than a metal conductive material. Particularly, in a high-definition plasma display panel or a large-area plasma display panel, the electric resistance of the transparent electrode is greatly increased. In addition, there is a problem that display quality is hindered and a high applied voltage is required.

In order to solve such a problem, a silver paste layer is formed on a transparent electrode to reduce the resistance of the display electrode. However, since the silver paste is whitish, the display contrast is reduced. There was a problem. Therefore, a black conductive layer is formed on the transparent electrode to reduce the resistance of the display electrode, and to enhance the contrast and color purity when the display panel is viewed from the front plate side. However, at present, a black conductive layer having sufficient blackness to maintain high display quality and having a low electric resistance has not been obtained. There is a problem that cannot be avoided.

The present invention has been made in view of the above-mentioned circumstances, and has a transfer sheet and an electrode forming method for forming an electrode capable of achieving high display quality even in a high-definition or large-area plasma display panel. The purpose is to provide.

[0006]

In order to achieve such an object, a first invention of a transfer sheet for forming an electrode of a plasma display panel comprises a transfer support, and a transfer sheet capable of being peeled off on the transfer support. The photosensitive conductive paste layer formed and the photosensitive black conductive paste layer containing a black pigment formed on the photosensitive conductive paste layer were provided.

In a second invention of a transfer sheet for forming electrodes of a plasma display panel, the transfer support has a light transmitting property.

According to a third aspect of the present invention, there is provided a transfer sheet for forming an electrode of a plasma display panel, comprising: a transfer support; and a photosensitive black conductive paste layer containing a black pigment formed releasably on the transfer support. It was configured to be provided with.

According to a fourth aspect of the present invention, there is provided a transfer sheet for forming electrodes of a plasma display panel, wherein the transfer support has a light transmitting property.

According to a fifth aspect of the present invention, there is provided a transfer sheet for forming an electrode of a plasma display panel, comprising: a transfer support; and a photosensitive conductive paste layer formed releasably on the transfer support. did.

According to a sixth aspect of the present invention, there is provided a transfer sheet for forming electrodes of a plasma display panel, wherein the transfer support has a light transmitting property.

According to a first aspect of the invention, there is provided a method for forming an electrode of a plasma display panel, wherein a photosensitive black conductive material is formed on a transparent electrode formed on an insulating substrate by using the transfer sheet for forming an electrode according to the first or second aspect. The photosensitive paste layer and the photosensitive conductive paste layer are transferred, and then the photosensitive black conductive paste layer and the photosensitive conductive paste layer are exposed through a mask having a predetermined pattern, developed, and baked. Thus, an electrode having a two-layer structure of a black conductive layer and a main conductive layer was formed.

A second invention of a method for forming an electrode of a plasma display panel is a method for forming an electrode-forming transfer sheet according to the second invention on a photosensitive black conductive paste layer side on a transparent electrode formed on an insulating substrate. Crimping, exposing the photosensitive black conductive paste layer and the photosensitive conductive paste layer from above the transfer support through a mask having a predetermined pattern, then peeling the transfer support, and then developing Then, firing was performed to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer.

According to a third aspect of the invention, there is provided a method for forming an electrode of a plasma display panel, wherein the photosensitive black conductive paste layer of the transfer sheet for forming an electrode according to the first or second aspect is provided through a mask having a predetermined pattern. Expose the photosensitive conductive paste layer, and then transfer the photosensitive black conductive paste layer and the photosensitive conductive paste layer of the transfer sheet onto a transparent electrode formed on an insulating substrate, and then develop Then, firing was performed to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer.

According to a fourth aspect of the invention, there is provided a method for forming an electrode of a plasma display panel, wherein the photosensitive black conductive paste layer of the transfer sheet for forming an electrode according to the first or second aspect of the invention is provided through a mask having a predetermined pattern. The photosensitive conductive paste layer is exposed and developed to form a pattern of the black conductive layer and a pattern of the main conductive layer, and then, on the transparent electrode formed on the insulating substrate, the pattern of the black conductive layer of the transfer sheet The pattern of the main conductive layer was transferred and then baked to form an electrode having a two-layer structure of the black conductive layer and the main conductive layer.

According to a fifth aspect of the invention, there is provided a method for forming an electrode of a plasma display panel, wherein a photosensitive black conductive material is formed on a transparent electrode formed on an insulating substrate by using the transfer sheet for forming an electrode according to the third or fourth aspect. The conductive paste layer is transferred, and further, the photosensitive conductive paste layer is transferred onto the photosensitive black conductive paste layer by using the electrode-forming transfer sheet of the fifth or sixth invention, and then, The photosensitive black conductive paste layer and the photosensitive conductive paste layer are exposed through a mask having a predetermined pattern, developed, and baked to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer. Configuration.

According to a sixth aspect of the present invention, there is provided a method for forming an electrode of a plasma display panel, wherein a photosensitive black conductive film is formed on a transparent electrode formed on an insulating substrate by using the electrode-forming transfer sheet of the third or fourth aspect. The conductive paste layer is transferred, and the photosensitive conductive paste layer side of the transfer sheet for forming an electrode according to the sixth aspect of the present invention is pressed on the photosensitive black conductive paste layer, and then a predetermined pattern is formed. Expose the photosensitive black conductive paste layer and the photosensitive conductive paste layer from above the transfer support through a mask having, and then peel off the transfer support, develop, and sinter the black conductive layer and the main conductive layer. The structure was such that an electrode having a two-layer structure was formed.

According to a seventh aspect of the invention, there is provided a method for forming an electrode of a plasma display panel, wherein a photosensitive black conductive film is formed on a transparent electrode formed on an insulating substrate by using the electrode-forming transfer sheet of the third or fourth aspect. Transferring the conductive paste layer, exposing the photosensitive black conductive paste layer through a mask having a predetermined pattern, and further applying the photosensitive black conductive paste layer on the photosensitive black conductive paste layer according to the fifth or sixth invention. The photosensitive conductive paste layer is transferred using a transfer sheet for forming an electrode, the photosensitive conductive paste layer is exposed through a mask having a predetermined pattern, and then developed and fired by blackening. The structure was such that an electrode having a two-layer structure of a layer and a main conductive layer was formed.

An eighth invention of a method of forming an electrode of a plasma display panel is characterized in that the photosensitive black conductive paste layer side of the transfer sheet for forming an electrode according to the fourth invention is formed on a transparent electrode formed on an insulating substrate. Crimping, after exposing the photosensitive black conductive paste layer from above the transfer support through a mask having a predetermined pattern, peeling the transfer support, further, on the photosensitive black conductive paste layer, 6th above
After pressing the photosensitive conductive paste layer side of the transfer sheet for forming an electrode according to the invention and exposing the photosensitive conductive paste layer from above the transfer support through a mask having a predetermined pattern, the transfer support is removed. After peeling, developing, and firing, an electrode having a two-layer structure of a black conductive layer and a main conductive layer was formed.

According to a ninth aspect of the present invention, there is provided a method for forming an electrode of a plasma display panel, wherein the photosensitive black conductive layer is formed on the transparent electrode formed on an insulating substrate by using the electrode-forming transfer sheet of the third or fourth aspect. Transferring the conductive paste layer, exposing and developing the photosensitive black conductive paste layer through a mask having a predetermined pattern to form a pattern of the black conductive layer, and further covering the pattern of the black conductive layer. The photosensitive conductive paste layer is transferred using the transfer sheet for forming an electrode according to the fifth or sixth aspect of the invention, and the photosensitive conductive paste layer is exposed and developed through a mask having a predetermined pattern. Then, a pattern of the main conductive layer was formed, followed by firing to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer.

According to a tenth aspect of the present invention, there is provided a method for forming an electrode of a plasma display panel, in which the photosensitive black conductive paste layer side of the electrode forming transfer sheet according to the fourth aspect of the present invention is provided on a transparent electrode formed on an insulating substrate. Crimping, exposing the photosensitive black conductive paste layer from above the transfer support through a mask having a predetermined pattern, peeling the transfer support, and then developing to form a pattern of the black conductive layer, The photosensitive conductive paste layer side of the transfer sheet for forming an electrode according to the sixth aspect of the present invention is press-bonded so as to cover the pattern of the conductive layer, and the photosensitive conductive paste is applied from above the transfer support through a mask having a predetermined pattern. A structure in which the paste layer is exposed and the transfer support is peeled off, developed to form a pattern of the main conductive layer, and then fired to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer. It was.

An eleventh invention of a method for forming an electrode of a plasma display panel is characterized in that the photosensitive black conductive paste layer of the transfer sheet for electrode formation according to the third or fourth invention is applied through a mask having a predetermined pattern. Exposure, then
The photosensitive black conductive paste layer of the transfer sheet is transferred onto the transparent electrode formed on the insulating substrate, and the transfer sheet for forming an electrode according to the fifth or sixth invention is transferred via a mask having a predetermined pattern. The photosensitive conductive paste layer is exposed to light, then the photosensitive conductive paste layer is transferred onto the photosensitive black conductive paste layer, and then developed and baked to obtain a black conductive layer and a main conductive layer. Was formed such that an electrode having a two-layer structure was formed.

According to a twelfth invention of a method for forming an electrode of a plasma display panel, the photosensitive black conductive paste layer of the transfer sheet for forming an electrode of the third or fourth invention is applied through a mask having a predetermined pattern. Exposure and development to form a pattern of a black conductive layer, then transfer the pattern of the black conductive layer of the transfer sheet onto a transparent electrode formed on an insulating substrate, and pass the same through a mask having a predetermined pattern. The photosensitive conductive paste layer of the transfer sheet for electrode formation according to the fifth or sixth invention is exposed and developed to form a pattern of the main conductive layer, and then the transfer sheet is formed on the pattern of the black conductive layer. The pattern of the main conductive layer was transferred and then fired to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer.

According to the present invention, the electrode having the two-layer structure of the black conductive layer and the main conductive layer transferred and formed on the transparent electrode by using the photosensitive paste layer formed on the transfer sheet is used. The layer reduces the electrical resistance of the transparent electrode, the black conductive layer increases the connection between the main conductive layer and the transparent electrode, and increases the contrast and color purity of the display panel.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the present invention will be described below. Transfer Sheet of First Invention FIG. 1 is a schematic cross-sectional view showing one embodiment of a transfer sheet for forming electrodes of a plasma display panel of the first invention. In FIG. 1, a transfer sheet 1 has a structure in which a photosensitive conductive paste layer 3 and a photosensitive black conductive paste layer 4 are laminated on a transfer support 2 in this order. Numeral 3 is detachable from the transfer support 2.

The transfer support 2 constituting the transfer sheet 1 includes polyethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide, polystyrene, polypropylene, polyethylene, polysulfone, polyamide, polycarbonate, polyvinyl alcohol,
Cellulose derivatives such as polyimide, cellophane and triacetyl cellulose, resin films such as ionomers, SU
Examples include metal thin plates of S, Al, Cu, and the like, and composites thereof. The thickness of such a transfer support 2 is 1 to
The thickness can be 400 μm, preferably about 4.5 to 200 μm, and the shape may be either a sheet shape or a long shape.
The transfer support 2 and the photosensitive conductive paste layer 3 are formed on the surface of the transfer support 2 on which the photosensitive conductive paste layer 3 is to be formed.
May be provided with a primer layer for adjusting the adhesiveness and the releasability of the primer. Such a primer layer is made of vinyl chloride-vinyl acetate copolymer, (meth) acrylate resin, isocyanate cured resin, epoxy resin, silicone resin (oil), fluororesin, polyethylene wax, carnauba wax, acrylic melamine resin, etc. And the thickness can be about 0.1 to 10 μm.

The photosensitive conductive paste layer 3 constituting the transfer sheet 1 contains at least a conductive powder and a photosensitive resin component, and is optionally used for the purpose of improving adhesion to a substrate on which electrodes are formed. A photosensitive conductive paste containing an inorganic powder can be formed on the transfer support 2 by coating and drying. Examples of the coating method include a blade coating method, a roll coating method, a die coating method, a bead coating method, a gravure coating method, a dip coating method, and a comma coating method.

The conductive powder includes Au powder, Ag powder, Cu
One or more of powder, Ni powder, Al powder, Ag-Pd powder and the like can be used. The shape of the conductive powder may be various shapes such as a sphere, a plate, a lump, a cone, a rod, etc., but a spherical conductive powder having good light transmittance, no aggregation and good dispersibility. The average particle size is preferably in the range of 0.05 to 10 μm. When the average particle size of the conductive powder is less than 0.05 μm, the structural viscosity (thixotropic property) of the photosensitive conductive paste is undesirably increased. On the other hand, when the average particle size of the conductive powder exceeds 10 μm, the transmittance of light applied to the photosensitive conductive paste layer 3 in the electrode forming method of the present invention described below becomes insufficient, and the photosensitive black conductive The exposure of the paste layer 4 will be hindered. Such a conductive powder can be contained in the photosensitive conductive paste layer 3 in a range of 45 to 93% by weight.

The inorganic powder optionally contained in the photosensitive conductive paste layer 3 includes, for example, a softening temperature of 40
0 to 650 ° C. and a coefficient of thermal expansion α ₃₀₀ of 60 × 10 ⁻⁷
A glass frit of 100 × 10 ⁻⁷ / ° C. can be used. If the softening temperature of the glass frit exceeds 650 ° C., it is necessary to increase the firing temperature. For example, when the heat resistance of the insulating substrate on which the electrode is to be formed is low, the insulating substrate is likely to be thermally deformed in the firing step, which is preferable. Absent. On the other hand, if the softening temperature of the glass frit is lower than 400 ° C., the glass frit is fused before the resin component of the photosensitive conductive paste layer 3 is completely decomposed and volatilized. Further, the coefficient of thermal expansion α ₃₀₀ of the glass frit is less than 60 × 10 ⁻⁷ / ° C., or 100 ×
If it exceeds 10 ⁻⁷ / ° C., the difference from the coefficient of thermal expansion of the glass substrate on which the electrode is formed becomes too large, causing distortion and the like, which is not preferable. The average particle size of such a glass frit is preferably in the range of 0.1 to 5 μm.

The photosensitive resin component constituting the photosensitive conductive paste layer 3 contains at least an alkali-developable binder polymer, a monomer, and an initiator. It does not leave carbide.

Examples of the alkali-developable binder polymer include acrylic acid, methacrylic acid, a dimer of acrylic acid (for example, M-5600 manufactured by Toa Gosei Chemical Co., Ltd.), itaconic acid, crotonic acid, maleic acid, fumaric acid, Vinyl acetic acid, one or more of these acid anhydrides, methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, n-propyl acrylate, n-propyl methacrylate, isopropyl acrylate, isopropyl methacrylate, n-butyl acrylate,
n-butyl methacrylate, sec-butyl acrylate,
sec-butyl methacrylate, isobutyl acrylate,
Isobutyl methacrylate, tert-butyl acrylate, tert-butyl methacrylate, n-pentyl acrylate, n-pentyl methacrylate, n-hexyl acrylate, n-hexyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate, n-octyl acrylate, n- Copolymers comprising one or more of octyl methacrylate, n-decyl acrylate, n-decyl methacrylate, styrene, α-methylstyrene, and 1-vinyl-2-pyrrolidone are exemplified.

Further, there may be mentioned, for example, polymers obtained by adding an ethylenically unsaturated compound having a glycidyl group or a hydroxyl group to the above-mentioned copolymer, but the invention is not limited thereto.

Incidentally, a non-alkali developing type polymer may be mixed with the above-mentioned alkali developing type binder polymer.
Examples of the non-alkali development type polymer include polyvinyl alcohol, polyvinyl butyral, acrylate polymer, methacrylate polymer, polystyrene, α
-Methylstyrene polymer, 1-vinyl-2-pyrrolidone polymer, and copolymers thereof.

As the reactive monomer constituting the photosensitive resin component, a compound having at least one polymerizable carbon-carbon unsaturated bond can be used. Specifically, allyl acrylate, benzyl acrylate, butoxyethyl acrylate, butoxyethylene glycol acrylate, cyclohexyl acrylate, dicyclopentanyl acrylate, 2-ethylhexyl acrylate, glycerol acrylate, glycidyl acrylate, 2-hydroxyethyl acrylate, 2-hydroxypropyl Acrylate, isobonyl acrylate,
Isodexyl acrylate, isooctyl acrylate, lauryl acrylate, 2-methoxyethyl acrylate, methoxyethylene glycol acrylate, phenoxyethyl acrylate, stearyl acrylate, ethylene glycol diacrylate, diethylene glycol diacrylate, 1,4-butanediol diacrylate, 1, 5-pentanediol diacrylate, 1,6-hexanediol diacrylate, 1,3
-Propanediol acrylate, 1,4-cyclohexanediol diacrylate, 2,2-dimethylolpropane diacrylate, glycerol diacrylate,
Tripropylene glycol diacrylate, glycerol triacrylate, trimethylolpropane triacrylate, polyoxyethylated trimethylolpropane triacrylate, pentaerythritol triacrylate, pentaerythritol tetraacrylate, triethylene glycol diacrylate, polyoxypropyl trimethylolpropane triacrylate , Butylene glycol diacrylate, 1,2,4-butanetriol triacrylate, 2,2,4-trimethyl-1,
3-pentanediol diacrylate, diallyl fumarate, 1,10-decanediol dimethyl acrylate, pentaerythritol hexaacrylate, and those obtained by changing the above acrylate to methacrylate, γ-methacryloxypropyltrimethoxysilane,
1-vinyl-2-pyrrolidone and the like. In the present invention, the above-mentioned reactive monomers can be used as one kind or a mixture of two or more kinds, or as a mixture with other compounds.

As the photopolymerization initiator constituting the photosensitive resin component, benzophenone, methyl o-benzoylbenzoate, 4,4-bis (dimethylamine) benzophenone,
4,4-bis (diethylamine) benzophenone, α-
Amino acetophenone, 4,4-dichlorobenzophenone, 4-benzoyl-4-methyldiphenyl ketone,
Dibenzyl ketone, fluorenone, 2,2-diethoxyacetophonone, 2,2-dimethoxy-2-phenylacetophenone, 2-hydroxy-2-methylpropiophenone, p-tert-butyldichloroacetophenone, thioxanthone, 2-methyl Thioxanthone, 2-chlorothioxanthone, 2-isopropylthioxanthone, diethylthioxanthone, benzyldimethylketal, benzylmethoxyethylacetal, benzoin methyl ether, benzoin butyl ether, anthraquinone,
2-tert-butylanthraquinone, 2-amylanthraquinone, β-chloroanthraquinone, anthrone, benzanthrone, dibensuberone, methyleneanthrone, 4-azidobenzylacetophenone, 2,6-bis (p-azidobenzylidene) cyclohexane, 2,6-
Bis (p-azidobenzylidene) -4-methylcyclohexanone, 2-phenyl-1,2-butadione-2-
(O-methoxycarbonyl) oxime, 1-phenyl-
Propanedione-2- (o-ethoxycarbonyl) oxime, 1,3-diphenyl-propanetrione-2-
(O-ethoxycarbonyl) oxime, 1-phenyl-
3-ethoxy-propanetrione-2- (o-benzoyl) oxime, Michler's ketone, 2-methyl- [4-
(Methylthio) phenyl] -2-morpholino-1-propane, naphthalenesulfonyl chloride, quinoline sulfonyl chloride, n-phenylthioacridone,
4,4-azobisisobutyronitrile, diphenyl disulfide, benzthiazole disulfide, triphenylphosphine, camphorquinone, carbon tetrabromide, tribromophenylsulfone, benzoin peroxide, eosine, methylene blue Examples include a combination of reducing agents such as ascorbic acid and triethanolamine. In the present invention, one or more of these photopolymerization initiators can be used.

When the temperature of volatilization and decomposition of the photosensitive resin component exceeds 600 ° C., the firing temperature for removing the resin component after the exposure and development of the photosensitive conductive paste layer 3 increases, for example, the electrode formation If the target board has low heat resistance,
Undesirably, thermal deformation occurs in the substrate. on the other hand,
The lower limit of the volatilization / decomposition temperature of the photosensitive resin component is not particularly limited. It is preferable to set the lower limit of the volatilization and decomposition temperature of the resin component to about 200 ° C.

The content of the photosensitive resin component in the photosensitive conductive paste layer 3 is preferably 5 to 40% by weight.

Further, the photosensitive conductive paste layer 3 may contain additives such as a sensitizer, a polymerization terminator, a chain transfer agent, a leveling agent, a dispersant, a plasticizer, a stabilizer, and a defoaming agent as required. Can be contained.

Examples of the solvent used for the photosensitive conductive paste include alcohols such as methanol, ethanol, n-propanel, i-propanol, ethylene glycol and propylene glycol, α- and β.
-Terpenes such as terpineol, ketones such as acetone, methyl ethyl ketone and cyclohexanone, aromatic hydrocarbons such as toluene, xylene and tetramethylbenzene, cellosolve, methyl cellosolve, ethyl cellosolve, carbitol, methyl carbitol, ethyl carbitol Tall, butyl carbitol, propylene glycol monomethyl ether, propylene glycol monoethyl ether, dipropylene glycol monomethyl ether,
Glycol ethers such as dipropylene glycol monoethyl ether, triethylene glycol monomethyl ether, triethylene glycol monoethyl ether,
Ethyl acetate, butyl acetate, cellosolve acetate, ethyl cellosolve acetate, butyl cellosolve acetate, carbitol acetate, ethyl carbitol acetate, butyl carbitol acetate, acetate esters such as propylene glycol monomethyl ether acetate, propylene glycol monoethyl ether acetate, and the like. Can be

The thickness of the photosensitive conductive paste layer 3 made of the photosensitive conductive paste as described above can be about 2 to 30 μm.

The photosensitive black conductive paste layer 4 constituting the transfer sheet 1 is formed by applying a photosensitive black conductive paste obtained by adding a black pigment to the above photosensitive conductive paste to the photosensitive conductive paste layer 3. It can be formed by drying. Examples of the coating method include a blade coating method, a roll coating method, a die coating method, a bead coating method, a gravure coating method, a dip coating method, and a comma coating method.

As the black pigment used in the photosensitive black conductive paste, conductive black pigments such as carbon black and titanium black, Co—Cr—Fe, Co—Mn—F
e, Co-Fe-Mn-Al, Co-Ni-Cr-F
e, Co-Ni-Mn-Cr-Fe, Co-Ni-Al
-Cr-Fe, Co-Mn-Al-Cr-Fe-Si and the like. Such a black pigment has an average particle size of about 0.01 to 5 μm, and is 0.1 to 100 parts by weight of the conductive powder contained in the photosensitive conductive paste.
It can be contained in the range of ５０50 parts by weight. When the average particle size of the above black pigment is less than 0.01 μm, it is difficult to produce such fine particles, and the thixotropy of the photosensitive black conductive paste becomes too large. If it exceeds 5 μm, color unevenness tends to occur, which is not preferable. Further, when the content of the black pigment is 0.1
When the amount is less than 50 parts by weight, the coloring is insufficient, and when the amount is more than 50 parts by weight, the resistance is increased, and the light transmittance is significantly reduced to cause poor curing at the exposed portion of the photosensitive black conductive paste layer 4. It is not preferable.

The thickness of the photosensitive black conductive paste layer 4 made of the photosensitive black conductive paste as described above is 1 to 1
It can be about 5 μm. The transfer sheet of the second invention is a transfer sheet for forming an electrode of a plasma display panel according to the second invention. In the transfer sheet 1 of the first invention, the transfer support 2 is made of polyethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide. , A polystyrene, polypropylene, polyethylene, polysulfone, polyamide, polycarbonate, polyvinyl alcohol, polyimide, cellophane, cellulose derivatives such as triacetylcellulose, and a light-transmissive resin film such as an ionomer. By imparting light transmittance to the transfer support 2 in this manner, the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 can be exposed from the transfer support 2 side. Transfer Sheet of Third Invention FIG. 2 is a schematic sectional view showing one embodiment of a transfer sheet for forming electrodes of a plasma display panel of the third invention. In FIG. 2, a transfer sheet 11 includes a transfer support 12
And a photosensitive black conductive paste layer 14 is provided on the upper surface thereof so as to be peelable.

The transfer support 12 forming the transfer sheet 11 can be the same as the transfer support 2 forming the transfer sheet 1 of the first invention. The transfer support 12 and the photosensitive black conductive paste layer 1 are formed on the surface of the transfer support 12 where the photosensitive black conductive paste layer 14 is to be formed.
A primer layer may be provided for adjusting the adhesiveness and the releasability with the primer layer 4.

The photosensitive black conductive paste layer 14 constituting the transfer sheet 11 is the same as the transfer sheet 1 of the first invention described above.
A photosensitive black conductive paste containing a black pigment in the photosensitive conductive paste is applied to the transfer support 12 and dried to form the same as the photosensitive black conductive paste layer 4 constituting Good. A transfer sheet according to a fourth aspect of the present invention is a transfer sheet for forming an electrode of a plasma display panel according to the fourth aspect of the present invention, wherein the transfer support 12 is made of polyethylene terephthalate, polyethylene naphthalate, or polyphenylene sulfide. , A polystyrene, polypropylene, polyethylene, polysulfone, polyamide, polycarbonate, polyvinyl alcohol, polyimide, cellophane, cellulose derivatives such as triacetylcellulose, and a light-transmissive resin film such as an ionomer. By imparting light transmittance to the transfer support 12 in this manner, it becomes possible to expose the photosensitive black conductive paste layer 14 from the transfer support 12 side. Transfer Sheet of Fifth Invention FIG. 3 is a schematic sectional view showing one embodiment of a transfer sheet for forming electrodes of a plasma display panel of the fifth invention. In FIG. 3, a transfer sheet 21 includes a transfer support 22.
And a photosensitive conductive paste layer 23 is provided thereon in a releasable manner.

The transfer support 22 forming the transfer sheet 21 can be the same as the transfer support 2 forming the transfer sheet 1 of the first invention. On the surface of the transfer support 22 on which the photosensitive conductive paste layer 23 is formed, a primer layer for adjusting the adhesion and the releasability between the transfer support 22 and the photosensitive conductive paste layer 23 is provided. Is also good.

The photosensitive conductive paste layer 23 forming the transfer sheet 21 transfers and supports the photosensitive conductive paste similarly to the photosensitive conductive paste layer 3 forming the transfer sheet 1 of the first invention. It may be formed by applying to the body 22 and drying. The transfer sheet of the sixth invention is a transfer sheet for forming an electrode of a plasma display panel according to the sixth invention, wherein the transfer support 22 is made of polyethylene terephthalate, polyethylene naphthalate, polyphenylene sulfide in the transfer sheet 21 of the fifth invention. , A polystyrene, polypropylene, polyethylene, polysulfone, polyamide, polycarbonate, polyvinyl alcohol, polyimide, cellophane, cellulose derivatives such as triacetylcellulose, and a light-transmissive resin film such as an ionomer. By imparting light transmittance to the transfer support 22 in this manner, the photosensitive conductive paste layer 23 can be exposed from the transfer support 22 side.

Next, a method for forming an electrode of a plasma display panel according to the present invention will be described. First invention Figure 4 of the electrode forming process is a process diagram showing an embodiment of a first invention of the electrode forming method of a plasma display panel. In FIG. 4, first, the photosensitive conductive paste layer 3 and the photosensitive conductive paste layer 3 are covered with the transfer sheet 1 for forming an electrode according to the first or second invention so as to cover the transparent electrode 52 formed on the insulating substrate 51. Is transferred to the conductive black conductive paste layer 4 (FIG. 4).
(A)). The transfer formation of the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 is performed by the transfer sheet 1
, And then the transfer support 2 is peeled off. Also, the transparent electrode 52
Are indium tin oxide (ITO), tin oxide (SnO
It can be formed of a known transparent conductive material such as ₂ ).

Next, the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 are exposed through a mask M having a predetermined pattern (FIG. 4B). In this exposure, light passing through the mask M and irradiating the photosensitive conductive paste layer 3 exposes the photosensitive conductive paste layer 3 and transmits through the photosensitive conductive paste layer 3 to form a photosensitive black paste. The conductive paste layer 4 is exposed. Such exposure includes, for example, a high-pressure mercury lamp, a low-pressure mercury lamp, a medium-high pressure mercury lamp, an ultra-high pressure mercury lamp, a xenon lamp, a mercury short arc lamp, a metal halide lamp, an X-ray,
It can be performed using a light source such as an electron beam. still,
In the above exposure, when the photosensitive conductive paste layer 3 has no adhesiveness to the mask M, the exposure can be performed by bringing the mask M into close contact with the photosensitive conductive paste layer 3. If it has adhesiveness, it is preferable to provide a gap between the mask M and the photosensitive conductive paste layer 3.

Next, after the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 are collectively developed,
By baking and removing the resin component constituting the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4, the electrode 55 having a two-layer structure of the black conductive layer 54 and the main conductive layer 53 is made transparent. Formed on the electrode 52 (FIG. 4
(C)). Second Embodiment of Electrode Forming Method FIG. 5 is a process chart showing an embodiment of the second invention of the electrode forming method of the plasma display panel. In FIG. 5, first, the photosensitive black conductive paste layer 4 side of the above-described electrode forming transfer sheet 1 of the second invention is pressure-bonded so as to cover the transparent electrode 52 formed on the insulating substrate 51, and The photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 are exposed from above the transfer support 2 through the mask M having the pattern (FIG. 5A). In this exposure, the light that has passed through the mask M is transferred to the transfer support 2 having optical transparency.
And the photosensitive conductive paste layer 3 is exposed to light, and the photosensitive black conductive paste layer 4 is exposed to light through the photosensitive conductive paste layer 3. Thus, the transfer support 2
Since the exposure is performed from above, the exposure can be performed regardless of the adhesiveness of the photosensitive conductive paste layer 3. The light source that can be used is the same as in the above-described electrode forming method of the first invention.

Next, the transfer support 2 is peeled off, and the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 are removed.
Is transferred, and the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 are collectively developed. Then, by baking to remove the resin component constituting the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4,
An electrode 55 having a two-layer structure of a black conductive layer 54 and a main conductive layer 53 is formed on the transparent electrode 52 (FIG. 5B). Third Embodiment of Electrode Forming Method FIG. 6 is a process chart showing an embodiment of the third invention of the electrode forming method of the plasma display panel. In FIG. 6, first, the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 of the above-described first or second invention transfer sheet 1 for forming an electrode are interposed via a mask M having a predetermined pattern. Is exposed (FIG. 6A). In this exposure, the light that has passed through the mask M exposes the photosensitive black conductive paste layer 4 and transmits the photosensitive black conductive paste layer 4 to expose the photosensitive conductive paste layer 3.
Light sources for performing such exposure include a high-pressure mercury lamp, a low-pressure mercury lamp, a medium-high pressure mercury lamp, an ultra-high pressure mercury lamp, a xenon lamp, a mercury short arc lamp,
It is preferable to use a metal halide lamp, X-ray, electron beam or the like. In the above exposure, when the photosensitive black conductive paste layer 4 does not have adhesiveness to the mask M, the mask M is replaced with the photosensitive black conductive paste layer 4.
Exposure can be performed in close contact with the mask, but in the case of having adhesiveness, it is preferable to provide a gap between the mask M and the photosensitive black conductive paste layer 4. The transfer support 2
When using the transfer sheet 1 of the second invention having a light transmitting property, the exposure may be performed via the mask M from the transfer support 2 side. In this case, usable light sources are the same as those in the above-described electrode forming method of the first invention.

Next, the exposed photosensitive conductive paste layer 3 and photosensitive black conductive paste layer 4 are transferred so as to cover the transparent electrode 52 formed on the insulating substrate 51 (FIG. 6B). )). Thereafter, the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 are collectively developed,
Then, by firing, the resin component constituting the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 is removed, whereby the electrode 55 having a two-layer structure of the black conductive layer 54 and the main conductive layer 53 is formed. Formed on the transparent electrode 52 (FIG. 6)
(C)). Fourth Invention of Electrode Forming Method FIG. 7 is a process chart showing an embodiment of a fourth invention of an electrode forming method of a plasma display panel. In FIG. 7, first, the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 of the above-described first or second invention transfer sheet 1 for forming an electrode are interposed via a mask M having a predetermined pattern. Is exposed (FIG. 7A). This exposure is
This can be the same as the above third invention.

Next, the photosensitive conductive paste layer 3 and the photosensitive black conductive paste layer 4 are collectively developed, and a pattern 3 'of the main conductive layer and a pattern 4' of the black conductive layer are formed on the transfer support 2. Is formed (FIG. 7B).

Next, the pattern 3 ′ of the main conductive layer and the pattern 4 ′ of the black conductive layer are transferred to predetermined positions of the transparent electrode 52 formed on the insulating substrate 51, and then baked to obtain the pattern of the main conductive layer. By removing the resin component constituting 3 ′ and the pattern 4 ′ of the black conductive layer, the electrode 55 having a two-layer structure of the black conductive layer 54 and the main conductive layer 53 is changed to the transparent electrode 52.
It is formed on top (FIG. 7C). Fifth Invention of Electrode Forming Method FIG. 8 is a process chart showing an embodiment of a fifth invention of a method of forming electrodes of a plasma display panel. In FIG. 8, first, the photosensitive black conductive paste layer 14 is formed using the electrode-forming transfer sheet 11 of the third or fourth invention so as to cover the transparent electrode 52 formed on the insulating substrate 51. Transfer (FIG. 8A). Next, the photosensitive conductive paste layer 23 is transferred onto the photosensitive black conductive paste layer 14 using the transfer sheet 21 for forming an electrode according to the fifth or sixth aspect of the present invention (FIG. 8B). )).

Next, the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are exposed through a mask M having a predetermined pattern (FIG. 8C). In this exposure, the photosensitive conductive paste layer 23 passing through the mask M is exposed.
Is applied to the photosensitive conductive paste layer 23 and is transmitted through the photosensitive conductive paste layer 23 to expose the photosensitive black conductive paste layer 14. still,
In the above exposure, when the photosensitive conductive paste layer 23 has no adhesiveness to the mask M, the mask M
Can be exposed in contact with the photosensitive conductive paste layer 23. However, if the photosensitive conductive paste layer 23 has adhesiveness, it is preferable to provide a gap between the mask M and the photosensitive conductive paste layer 23. The light source that can be used is the same as in the above-described electrode forming method of the first invention.

Next, after the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are collectively developed and baked, the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are combined. By removing the constituent resin components, an electrode 55 having a two-layer structure of the black conductive layer 54 and the main conductive layer 53 is formed on the transparent electrode 52 (FIG. 8).
(D)). Sixth Invention of Electrode Forming Method FIG. 9 is a process chart showing an embodiment of a sixth invention of a method of forming electrodes of a plasma display panel. In FIG. 9, first, the photosensitive black conductive paste layer 14 is covered with the electrode-forming transfer sheet 11 of the third or fourth invention so as to cover the transparent electrode 52 formed on the insulating substrate 51. Transfer (FIG. 9A). Next, on the photosensitive black conductive paste layer 14, the photosensitive conductive paste layer 23 side of the above-described transfer sheet 21 for forming an electrode according to the sixth invention is pressure-bonded to form a mask M having a predetermined pattern. The photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are exposed from above the transfer support 22 via the transfer support 22 (FIG. 9).
(B)). In this exposure, the light that has passed through the mask M passes through the light-transmissive transfer support 22 to expose the photosensitive conductive paste layer 23, and passes through the photosensitive conductive paste layer 23 to expose the photosensitive conductive paste layer 23. Black conductive paste layer 14
Is exposed. Since the exposure is performed from the transfer support 22 in this manner, the exposure can be performed regardless of the adhesiveness of the photosensitive conductive paste layer 23. The light source that can be used is the same as in the above-described electrode forming method of the first invention.

Next, the transfer support 22 is peeled off, the photosensitive conductive paste layer 23 is transferred, and the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are collectively developed. Thereafter, the electrode 55 having a two-layer structure of a black conductive layer 54 and a main conductive layer 53 is removed by baking to remove a resin component constituting the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14. Is formed on the transparent electrode 52 (FIG. 9D). Seventh Invention of Electrode Forming Method FIG. 10 is a process chart showing an embodiment of a seventh invention of a method of forming electrodes of a plasma display panel. 10, first, a transparent electrode 52 formed on an insulating substrate 51 is formed.
The photosensitive black conductive paste layer 14 is transferred using the electrode-forming transfer sheet 11 according to the third or fourth aspect of the present invention as described above so as to cover the photosensitive black conductive layer 14 via a mask M having a predetermined pattern. The conductive paste layer 14 is exposed (FIG. 10A).

Next, the photosensitive black conductive paste layer 1
The photosensitive conductive paste layer 23 of the transfer sheet 21 for electrode formation according to the fifth or sixth invention is transferred onto the photosensitive conductive paste layer 4, and the photosensitive conductive paste layer 23 is transferred via a mask M 'having a predetermined pattern. 23 is exposed (FIG. 10B). In this exposure, the light that has passed through the mask M ′ exposes the photosensitive conductive paste layer 23 and transmits through the photosensitive conductive paste layer 23 to form the photosensitive black conductive paste layer 14.
, But the mask M ′ is
The photosensitive black conductive paste layer 14 is not subjected to unnecessary exposure because it has an opening that overlaps the opening of FIG. In such an exposure, the photosensitive black conductive paste layer 14 does not have adhesiveness to the mask M, and the photosensitive conductive paste layer 23 does not have adhesiveness to the mask M ′. In order to perform exposure, the masks M and M ′ can be brought into close contact with the photosensitive black conductive paste layer 14 and the photosensitive conductive paste layer 23. It is preferable to provide a gap between them. The light source that can be used is the same as in the above-described electrode forming method of the first invention.

Next, the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are collectively developed. Thereafter, by firing, the resin components constituting the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are removed, whereby the black conductive layer 54 and the main conductive layer 53 are removed.
An electrode 55 having a two-layer structure is formed on the transparent electrode 52 (FIG. 10C). Eighth Invention of Electrode Forming Method FIG. 11 is a process chart showing an embodiment of the eighth invention of the electrode forming method of the plasma display panel. In FIG. 11, first, a transparent electrode 52 formed on an insulating substrate 51 is formed.
The photosensitive black conductive paste layer 14 side of the above-described electrode forming transfer sheet 11 of the fourth aspect of the present invention is pressure-bonded so as to cover the transfer support 12 via a mask M having a predetermined pattern. The conductive black conductive paste layer 14 is exposed (FIG. 11A). In this exposure, the light that has passed through the mask M passes through the light-transmissive transfer support 12 to expose the photosensitive black conductive paste layer 4.

Next, the transfer support 12 is peeled off, and the photosensitive conductive paste layer 23 of the transfer sheet 21 for forming an electrode according to the sixth invention is formed on the photosensitive black conductive paste layer 14.
The side is pressed, and the photosensitive conductive paste layer 23 is exposed from above the transfer support 22 through a mask M ′ having a predetermined pattern (FIG. 11B). In this exposure, the mask M '
The light that has passed through the transfer support 22 exposes the photosensitive conductive paste layer 23 and transmits through the photosensitive conductive paste layer 23 to form the photosensitive black conductive paste layer 14.
, But the mask M ′ is
The photosensitive black conductive paste layer 14 is not subjected to unnecessary exposure because it has an opening that overlaps the opening of FIG.

As described above, since the exposure is performed from the transfer support 12 or the transfer support 22, the exposure can be performed regardless of the adhesiveness of the photosensitive black conductive paste layer 14 and the photosensitive conductive paste layer 23. . The light source that can be used is the same as in the above-described electrode forming method of the first invention.

Next, the transfer support 22 is peeled off, and the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are collectively developed. Then, it is baked to form the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 1.
By removing the resin component constituting 4, an electrode 55 having a two-layer structure of the black conductive layer 54 and the main conductive layer 53 is formed on the transparent electrode 52 (FIG. 11C). Ninth Invention of Electrode Forming Method FIG. 12 is a process chart showing an embodiment of a ninth invention of a method of forming electrodes of a plasma display panel. 12, first, a transparent electrode 52 formed on an insulating substrate 51 is formed.
The photosensitive black conductive paste layer 14 is transferred using the electrode-forming transfer sheet 11 according to the third or fourth aspect of the present invention as described above so as to cover the photosensitive black conductive layer 14 via a mask M having a predetermined pattern. The conductive paste layer 14 is exposed (FIG. 12A).

Next, the photosensitive black conductive paste layer 14 is developed to form a black conductive layer pattern 14 ′ on the transparent electrode 52.
Is formed (FIG. 12B). Thereafter, the transfer sheet 21 for forming an electrode according to the fifth or sixth aspect of the invention described above is so covered as to cover the transparent electrode 52 and the pattern 14 ′ of the black conductive layer.
Is transferred, and the photosensitive conductive paste layer 23 is exposed through a mask M ′ having a predetermined pattern (FIG. 12C). This mask M '
As shown, the mask M has an opening that overlaps with the opening of the mask M.

Next, the photosensitive conductive paste layer 23 is developed to form a main conductive layer pattern 23 'on the black conductive layer pattern 14' (FIG. 12D).

In the above exposure, the photosensitive black conductive paste layer 14 did not have adhesiveness to the mask M, and the photosensitive conductive paste layer 23 had adhesiveness to the mask M '. When there is no mask, the masks M and M 'can be exposed by bringing the masks M and M' into close contact with the photosensitive black conductive paste layer 14 and the photosensitive conductive paste layer 23. It is preferable to provide a gap between the layer and the paste layer. The light source that can be used is the same as in the above-described electrode forming method of the first invention.

Next, the pattern 23 of the main conductive layer is fired.
′ And the resin component constituting the black conductive layer pattern 14 ′ are removed, whereby the black conductive layer 54 and the main conductive layer 53 are removed.
An electrode 55 having a two-layer structure is formed on the transparent electrode 52 (FIG. 12E). Tenth Invention of Electrode Forming Method FIG. 13 is a process chart showing an embodiment of a tenth invention of a method of forming electrodes of a plasma display panel. FIG.
First, the transparent electrode 5 formed on the insulating substrate 51
2 so as to cover the photosensitive black conductive paste layer 14 side of the transfer sheet 11 for forming an electrode according to the fourth aspect of the present invention, and from above the transfer support 12 via a mask M having a predetermined pattern. The photosensitive black conductive paste layer 14 is exposed (FIG. 13A). In this exposure, light that has passed through the mask M passes through the light-transmissive transfer support 12 to expose the photosensitive black conductive paste layer 14.

Next, after peeling off the transfer support 12, the photosensitive black conductive paste layer 14 is developed to form a black conductive layer pattern 14 ′ on the transparent electrode 52 (FIG. 13).
(B)).

Next, the photosensitive conductive paste layer 23 of the transfer sheet 21 for forming an electrode according to the above-described sixth invention is covered so as to cover the transparent electrode 52 and the pattern 14 ′ of the black conductive layer.
The side is pressed, and the photosensitive conductive paste layer 23 is exposed from above the transfer support 22 through a mask M ′ having a predetermined pattern (FIG. 13C). This mask M ′ has an opening that overlaps the opening of the mask M as shown in the figure.

As described above, since the exposure is performed from the transfer support 12 or the transfer support 22, the exposure can be performed regardless of the adhesiveness of the photosensitive black conductive paste layer 14 and the photosensitive conductive paste layer 23. . The light source that can be used is the same as in the above-described electrode forming method of the first invention.

Next, the transfer support 22 is peeled off, and the photosensitive conductive paste layer 23 is developed to form a main conductive layer pattern 23 'on the black conductive layer pattern 14'.
3 (D)).

Next, the pattern 23 of the main conductive layer is fired.
′ And the resin component constituting the black conductive layer pattern 14 ′ are removed, whereby the black conductive layer 54 and the main conductive layer 53 are removed.
An electrode 55 having a two-layer structure is formed on the transparent electrode 52 (FIG. 13E). Eleventh Invention of Electrode Forming Method FIG. 14 is a process chart showing an embodiment of an eleventh invention of a method of forming electrodes of a plasma display panel. FIG.
First, the photosensitive black conductive paste layer 14 of the above-described third or fourth invention transfer sheet 11 for electrode formation is exposed through a mask M having a predetermined pattern (FIG. 14A). . In this exposure, when the photosensitive black conductive paste layer 14 does not have adhesiveness to the mask M, the exposure can be performed by bringing the mask M into close contact with the photosensitive black conductive paste layer 14. In the case of having adhesiveness, it is preferable to provide a gap between the mask M and the photosensitive black conductive paste layer 14. The transfer support 1
In the case where the transfer sheet 11 according to the fourth aspect of the present invention is used, the exposure may be performed through the mask M from the transfer support 12 side. The light source that can be used is the first light source described above.
It is the same as the electrode forming method of the invention of the fourth aspect.

Next, the exposed photosensitive black conductive paste layer 14 is transferred so as to cover the transparent electrode 52 formed on the insulating substrate 51 (FIG. 14B).

On the other hand, a mask M 'having a predetermined pattern
The photosensitive conductive paste layer 23 of the transfer sheet 21 for forming an electrode according to the fifth or sixth aspect of the invention is exposed to light through (FIG. 14C). In this exposure, when the photosensitive conductive paste layer 23 does not have adhesiveness to the mask M ′, the exposure can be performed by bringing the mask M ′ into close contact with the photosensitive conductive paste layer 23. In the case of having adhesiveness, it is preferable to provide a gap between the mask M 'and the photosensitive conductive paste layer 23. In the case where the transfer sheet 22 of the sixth invention having a light transmitting property is used as the transfer support 22, exposure may be performed from the transfer support 22 side via a mask M '. The light source that can be used is the same as in the above-described electrode forming method of the first invention.

Next, the exposed photosensitive conductive paste layer 23 is transferred onto the photosensitive black conductive paste layer 14 (FIG. 14D).

Next, the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are collectively developed. Thereafter, by firing, the resin components constituting the photosensitive conductive paste layer 23 and the photosensitive black conductive paste layer 14 are removed, whereby the black conductive layer 54 and the main conductive layer 53 are removed.
An electrode 55 having a two-layer structure is formed on the transparent electrode 52 (FIG. 14E). Twelfth Invention of Electrode Forming Method FIG. 15 is a process chart showing an embodiment of a twelfth invention of a method of forming electrodes of a plasma display panel. FIG.
First, the photosensitive black conductive paste layer 14 of the transfer sheet 11 for forming an electrode according to the third or fourth invention is exposed through a mask M having a predetermined pattern (FIG. 15A). . This exposure can be performed in the same manner as in the above-described electrode forming method according to the eleventh aspect.

Next, the photosensitive black conductive paste layer 14 is developed, and the black conductive layer pattern 14 is formed on the transfer support 12.
'Is formed (FIG. 15B). Next, the insulating substrate 51
The pattern 14 'of the black conductive layer is transferred to a predetermined position of the transparent electrode 52 formed thereon (FIG. 15C).

On the other hand, a mask M 'having a predetermined pattern
The photosensitive conductive paste layer 23 of the transfer sheet 21 for forming an electrode according to the fifth or sixth aspect of the present invention is exposed to light (FIG. 15D). This exposure can be performed in the same manner as in the above-described electrode forming method according to the eleventh aspect.

Next, the photosensitive conductive paste layer 23 is developed to form a main conductive layer pattern 23 'on the transfer support 22, and this is transferred onto the black conductive layer pattern 14' (FIG. 15). (E)).

Then, firing is performed to form a pattern 2 of the main conductive layer.
By removing the resin components constituting the pattern 3 'and the black conductive layer pattern 14', the black conductive layer 54 and the main conductive layer 5 are removed.
An electrode 55 having a two-layer structure of No. 3 is formed on the transparent electrode 52 (FIG. 15F).

In the above-described electrode forming method, the photosensitive conductive paste layer and the photosensitive black conductive paste layer are developed after exposure by an aqueous solution of sodium carbonate, sodium hydroxide, potassium hydroxide, potassium carbonate, monoethanol. It can be performed using an organic alkali such as an amine.

[0081]

Next, the present invention will be described in more detail with reference to examples. (Example 1) First, a photosensitive conductive paste having the following composition was prepared.

(Composition of Photoconductive Conductive Paste) A polymer obtained by adding glycidyl methacrylate to a methyl methacrylate / methacrylic acid copolymer: 100 parts by weight Ethylene oxide-modified trimethylolpropane triacrylate: 60 parts by weight Polymerization initiator ( 15 parts by weight ・ Propylene glycol monomethyl ether ・ ・ ・ 100 parts by weight ・ Ag powder 650 parts by weight ・ Glass frit (softening point 550 ° C, coefficient of thermal expansion 80 × 10 ^-7 / ° C) ... 40 parts by weight A photosensitive black conductive paste was prepared by adding 5 parts by weight of titanium black (average particle size: 1.3 μm) to 100 parts by weight of the above-mentioned photosensitive conductive paste.

Next, the above-mentioned photosensitive conductive paste is applied by a gravure coating method to a polyethylene terephthalate film (Lumirror T, manufactured by Toray Industries, Inc., thickness 25 μm) as a transfer support, and dried to form a photosensitive conductive paste layer. (Thickness: 12 μm). Next, the above-mentioned photosensitive black conductive paste is applied thereon by a gravure coating method and dried to form a photosensitive black conductive paste layer (8 μm thick).
m) were laminated to prepare a transfer sheet (having the structure shown in FIG. 1).

Next, a photosensitive conductive paste layer and a photosensitive black conductive paste layer were formed on a glass substrate on which a transparent electrode made of indium tin oxide (ITO) was patterned (line width: 150 μm) using the above transfer sheet. Was transferred (corresponding to FIG. 4 (A)). This transfer is performed by transferring the transfer sheet 10 times.
This was performed by pressing at 0 ° C. on a glass substrate.

Next, the photosensitive conductive paste layer and the photosensitive black conductive paste layer were collectively exposed to ultraviolet rays through a mask having an opening having a line width of 80 μm (corresponding to FIG. 4B). ).

Next, development is performed using a 1% aqueous solution of Na ₂ CO ₃ , followed by baking at a peak temperature of 570 ° C. to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer (line width 70 μm,
4 μm) was formed on the ITO transparent electrode (FIG. 4).
(Equivalent to (C)).

As a result of producing a plasma display panel using a glass substrate having a two-layered electrode formed on an ITO transparent electrode as described above, a plasma display panel having high display contrast, high color purity and excellent display quality was obtained. Obtained. Example 2 First, the photosensitive black conductive paste of Example 1 was applied to a polyethylene terephthalate film (Lumirror T, manufactured by Toray Industries, Ltd., 12 μm thick) as a transfer support by a roll coating method, and dried to obtain a photosensitive material. Transfer Sheet A with Black Conductive Paste Layer (10 μm Thick) Formed
(Having the structure shown in FIG. 2).

Further, the photosensitive conductive paste of Example 1 was applied to a polyethylene terephthalate film (Lumirror T, manufactured by Toray Industries, Inc., thickness 25 μm) as a transfer support by a comma coating method, dried, and dried. A layer (having a thickness of 15 μm) was formed to prepare a transfer sheet B (having the structure shown in FIG. 3).

Next, the photosensitive black conductive paste layer side of the transfer sheet A was crimped onto a glass substrate on which a transparent electrode made of indium tin oxide (ITO) was patterned (line width 150 μm), and the line width was 50 μm. The photosensitive black conductive paste layer was exposed to ultraviolet light through a mask having an opening of No. 3 (corresponding to FIG. 11A). Thereafter, the transfer support was peeled off, and the photosensitive black conductive paste layer was transferred.

Next, the photosensitive conductive paste layer side of the transfer sheet B is pressed on the photosensitive black conductive paste layer, and irradiated with ultraviolet rays through a mask having an opening having a line width of 50 μm. The photosensitive conductive paste layer was exposed (FIG. 1).
1 (B)). Thereafter, the transfer support was peeled off, and the photosensitive conductive paste layer was transferred. The mask used had an opening overlapping with the opening of the mask used for the exposure of the photosensitive black conductive paste layer.

Next, development was performed using a 1% aqueous solution of Na ₂ CO ₃ , followed by firing at a peak temperature of 570 ° C. to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer (line width 40 μm,
11 μm) was formed on the ITO transparent electrode (FIG. 11).
(Equivalent to (C)).

As a result of producing a plasma display panel using a glass substrate having a two-layered electrode formed on an ITO transparent electrode as described above, a plasma display panel having high display contrast, high color purity and excellent display quality was obtained. Obtained.

The first embodiment uses the transfer sheet of the first invention and follows the method of forming an electrode of the first invention, and the second embodiment has the fourth and sixth inventions. Although the transfer sheet according to the eighth aspect of the present invention is used in accordance with the electrode forming method of the eighth aspect of the present invention, the ITO transparent sheet can be similarly formed by using the other transfer sheet of the present invention and according to the other electrode forming method of the present invention. It is needless to say that a plasma display panel having a large reduction in electric resistance of the electrodes and high display contrast and color purity and excellent display quality can be obtained.

[0094]

As described in detail above, according to the present invention, a transfer sheet comprising a photosensitive black conductive paste layer containing a black pigment and a photosensitive conductive paste layer on a transfer support,
Alternatively, using a transfer sheet provided with a photosensitive black conductive paste layer containing a black pigment on a transfer support and a transfer sheet provided with a photosensitive conductive paste layer on a transfer support, a transparent insulating substrate is used. A black conductive layer and a main conductive layer
An electrode (bus electrode) having a layer structure is formed. The electric resistance of the transparent electrode is reduced by the main conductive layer of the electrode having the two-layer structure, and the connection between the main conductive layer and the transparent electrode is formed by the black conductive layer. In addition, the contrast and color purity of the display panel are increased, and by forming the electrodes in this manner, high display quality can be achieved even in a high-definition or large-area plasma display panel. It is not necessary to use a photoresist, so that the process is simple and the effect that the electrode formation accuracy is higher than that of the printing method is also exhibited.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing one embodiment of a first invention of a transfer sheet for forming electrodes of a plasma display panel.

FIG. 2 is a schematic sectional view showing an embodiment of a third invention of a transfer sheet for forming electrodes of a plasma display panel.

FIG. 3 is a schematic sectional view showing an embodiment of a fifth invention of a transfer sheet for forming electrodes of a plasma display panel.

FIG. 4 is a process chart showing one embodiment of the first invention of the method for forming electrodes of the plasma display panel.

FIG. 5 is a process chart showing an embodiment of a second invention of a method for forming electrodes of a plasma display panel.

FIG. 6 is a process chart showing one embodiment of a third invention of a method for forming electrodes of a plasma display panel.

FIG. 7 is a process chart showing one embodiment of a fourth invention of a method for forming electrodes of a plasma display panel.

FIG. 8 is a process chart showing one embodiment of a fifth invention of a method for forming electrodes of a plasma display panel.

FIG. 9 is a process chart showing one embodiment of the sixth invention of the method for forming electrodes of the plasma display panel.

FIG. 10 is a process chart showing one embodiment of a seventh invention of a method for forming electrodes of a plasma display panel.

FIG. 11 is a process chart showing one embodiment of an eighth invention of a method for forming electrodes of a plasma display panel.

FIG. 12 is a process chart showing an embodiment of a ninth invention of a method for forming electrodes of a plasma display panel.

FIG. 13 is a process chart showing an embodiment of a tenth invention of a method for forming electrodes of a plasma display panel.

FIG. 14 is a process chart showing an embodiment of an eleventh invention of a method for forming electrodes of a plasma display panel.

FIG. 15 is a process chart showing an embodiment of a twelfth invention of a method for forming electrodes of a plasma display panel. 1,11,21 transfer sheet 2,12,22 transfer support 3,23 photosensitive conductive paste layer 4,14 photosensitive black conductive paste layer 3 ', 23' main conductive layer pattern 4 ', 14' ... pattern of black conductive layer 51 ... insulating substrate 52 ... transparent electrode 53 ... main conductive layer 54 ... black conductive layer 55 ... electrode M, M '... mask

Claims (18)

[Claims] 1. A transfer support, a photosensitive conductive paste layer releasably formed on the transfer support, and a photosensitive black containing a black pigment formed on the photosensitive conductive paste layer A transfer sheet for forming electrodes of a plasma display panel, comprising: a conductive paste layer. 2. The transfer sheet for forming electrodes of a plasma display panel according to claim 1, wherein the transfer support has optical transparency. 3. An electrode for forming an electrode of a plasma display panel, comprising: a transfer support; and a photosensitive black conductive paste layer containing a black pigment formed releasably on the transfer support. Transfer sheet. 4. The transfer sheet for forming electrodes of a plasma display panel according to claim 3, wherein the transfer support has a light transmitting property. 5. A transfer sheet for forming electrodes of a plasma display panel, comprising: a transfer support; and a photosensitive conductive paste layer releasably formed on the transfer support. 6. The transfer sheet for forming electrodes of a plasma display panel according to claim 5, wherein the transfer support has a light transmitting property. 7. A photosensitive black conductive paste layer and a photosensitive conductive paste layer on a transparent electrode formed on an insulating substrate using the transfer sheet for electrode formation according to claim 1 or 2. Then, the photosensitive black conductive paste layer and the photosensitive conductive paste layer are exposed to light through a mask having a predetermined pattern, developed, and baked to form two layers of a black conductive layer and a main conductive layer. An electrode forming method for a plasma display panel, comprising forming an electrode having a structure. 8. The photosensitive black conductive paste layer side of the transfer sheet for electrode formation according to claim 2 is pressed on a transparent electrode formed on an insulating substrate via a mask having a predetermined pattern. Expose the photosensitive black conductive paste layer and the photosensitive conductive paste layer from the transfer support,
A method for forming an electrode for a plasma display panel, comprising: removing a transfer support, developing the transfer support, and then baking to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer. 9. The photosensitive black conductive paste layer and the photosensitive conductive paste layer of the transfer sheet for forming an electrode according to claim 1 or 2 are exposed through a mask having a predetermined pattern. Then, the photosensitive black conductive paste layer and the photosensitive conductive paste layer of the transfer sheet were transferred onto the transparent electrode formed on the insulating substrate, and then developed and fired to form the black conductive layer. An electrode forming method for a plasma display panel, comprising forming an electrode having a two-layer structure of a conductive layer. 10. The photosensitive black conductive paste layer and the photosensitive conductive paste layer of the transfer sheet for forming an electrode according to claim 1 or 2 are exposed and developed through a mask having a predetermined pattern. Forming a pattern of the black conductive layer and a pattern of the main conductive layer, and then transferring the pattern of the black conductive layer and the pattern of the main conductive layer of the transfer sheet onto the transparent electrode formed on the insulating substrate, And baking to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer. 11. On a transparent electrode formed on an insulating substrate,
The photosensitive black conductive paste layer is transferred by using the transfer sheet for forming an electrode according to claim 3 or 4, and further on the photosensitive black conductive paste layer. The photosensitive conductive paste layer is transferred using the transfer sheet for forming an electrode according to the above, and then the photosensitive black conductive paste layer and the photosensitive conductive paste layer are exposed through a mask having a predetermined pattern. After developing,
An electrode forming method for a plasma display panel, comprising forming an electrode having a two-layer structure of a black conductive layer and a main conductive layer by firing. 12. On a transparent electrode formed on an insulating substrate,
The photosensitive black conductive paste layer is transferred using the electrode-forming transfer sheet according to claim 3 or 4, and further, the electrode according to claim 6 on the photosensitive black conductive paste layer. The photosensitive conductive paste layer side of the transfer sheet for forming is pressed, and then the photosensitive black conductive paste layer and the photosensitive conductive paste layer are exposed from above the transfer support through a mask having a predetermined pattern. Next, the transfer support is peeled off, developed, and fired to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer. 13. A transparent electrode formed on an insulating substrate,
The photosensitive black conductive paste layer is transferred using the transfer sheet for forming an electrode according to claim 3 or 4, and the photosensitive black conductive paste layer is exposed through a mask having a predetermined pattern. Further, a photosensitive conductive paste layer is transferred onto the photosensitive black conductive paste layer using the transfer sheet for electrode formation according to claim 5 or 6, and a mask having a predetermined pattern is formed. Exposing the photosensitive conductive paste layer to light, then developing and baking to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer. Method. 14. On a transparent electrode formed on an insulating substrate,
The photosensitive black conductive paste layer side of the transfer sheet for electrode formation according to claim 4 was press-bonded, and the photosensitive black conductive paste layer was exposed from above the transfer support through a mask having a predetermined pattern. Thereafter, the transfer support is peeled off, and the photosensitive conductive paste layer side of the transfer sheet for forming an electrode according to claim 6 is pressed on the photosensitive black conductive paste layer to form a predetermined pattern. After exposing the photosensitive conductive paste layer from above the transfer support through a mask having, the transfer support is peeled off, then developed, and then baked to have a two-layer structure of a black conductive layer and a main conductive layer. An electrode forming method for a plasma display panel, comprising forming an electrode. 15. On a transparent electrode formed on an insulating substrate,
The photosensitive black conductive paste layer is transferred using the transfer sheet for forming an electrode according to claim 3 or 4, and the photosensitive black conductive paste layer is exposed through a mask having a predetermined pattern. Developing to form a pattern of the black conductive layer, and further using the transfer sheet for forming an electrode according to claim 5 or 6 so as to cover the pattern of the black conductive layer. The photosensitive conductive paste layer is transferred and exposed through a mask having a predetermined pattern and developed to form a pattern of the main conductive layer, and then fired to form a two-layer structure of a black conductive layer and a main conductive layer. An electrode forming method for a plasma display panel, comprising forming an electrode comprising: 16. On a transparent electrode formed on an insulating substrate,
The photosensitive black conductive paste layer side of the transfer sheet for electrode formation according to claim 4 is pressed, and the photosensitive black conductive paste layer is exposed and transferred from above the transfer support through a mask having a predetermined pattern. The photosensitive conductive paste layer side of the transfer sheet for electrode formation according to claim 6, wherein the support is peeled off and then developed to form a pattern of the black conductive layer, and further cover the pattern of the black conductive layer. Is pressed, and the photosensitive conductive paste layer is exposed from above the transfer support through a mask having a predetermined pattern, and the transfer support is peeled off and developed to form a pattern of the main conductive layer. Forming an electrode having a two-layer structure of a black conductive layer and a main conductive layer by using the same. 17. Exposing the photosensitive black conductive paste layer of the transfer sheet for electrode formation according to claim 3 or 4 through a mask having a predetermined pattern,
The transfer for forming an electrode according to claim 5 or 6, wherein the photosensitive black conductive paste layer of the transfer sheet is transferred onto a transparent electrode formed on an insulating substrate, and the mask is provided with a predetermined pattern. The photosensitive conductive paste layer of the sheet is exposed, then the photosensitive conductive paste layer is transferred onto the photosensitive black conductive paste layer, and then developed and baked to obtain a black conductive layer and a main conductive paste layer. An electrode forming method for a plasma display panel, comprising forming an electrode having a two-layer structure. 18. The pattern of the black conductive layer is formed by exposing and developing the photosensitive black conductive paste layer of the transfer sheet for electrode formation according to claim 3 through a mask having a predetermined pattern. 7. The electrode formation according to claim 5 or 6, wherein the pattern of the black conductive layer of the transfer sheet is transferred onto a transparent electrode formed on an insulating substrate, and the mask having a predetermined pattern is transferred. Expose and develop the photosensitive conductive paste layer of the transfer sheet for the main conductive layer to form a pattern, then transfer the pattern of the main conductive layer of the transfer sheet on the pattern of the black conductive layer,
Thereafter, firing is performed to form an electrode having a two-layer structure of a black conductive layer and a main conductive layer.