JPH08106006A - Dye molecule injection method, image forming method, and color filter manufacturing method - Google Patents

Abstract

(57) [Summary] [Structure] A source film (A) in which a dye capable of absorbing pulsed laser light, for example, pyrene or phthalocyanine, is dispersed in an organic polymer compound (a), and an organic compound capable of transmitting pulsed laser light. The target film (B) made of the molecular compound (b) is brought into close contact with the target film (B), and pulse laser light having an intensity equal to or lower than the ablation threshold of the source film (A) is transmitted through the target film (B). By injecting the dye in the source film (A) into the target film by irradiating the film, a method for forming an image on the target film (B) using this method, and an image forming method using the method A color filter manufacturing method that injects red, green, and blue dyes into a target film. [Effect] The dye is not decomposed and is uniformly and efficiently injected into the target film without being diffused, and it is possible to form an image with a sharp contour with high color reproducibility and homogeneity. It can be used for image formation such as printing and for making color filters for displays such as liquid crystal displays.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for irradiating a target film with a dye by irradiating it with pulsed laser light, an image forming method using the same and a color filter manufacturing method.

[0002]

2. Description of the Related Art Conventionally, as a method for forming an image by transferring a dye onto a target film using a pulsed laser beam, a transfer dye, a light absorbing dye, a decomposable resin and a sensitization for promoting decomposition are formed on a substrate. An image forming method in which a source film is formed by applying a coating material containing an agent and a dye is transferred using a laser-induced ablation transfer method in which a pulsed laser beam having an intensity that decomposes the source film is irradiated. No. 506709) is known.

On the other hand, an organic polymer compound film (source film) containing a light-absorbing dye and an organic polymer compound film (target film) which transmits laser light are placed opposite to each other, and pulse laser light is emitted from the target film side. Upon irradiation, so-called laser ablation (laser bombardment) occurs, and under certain appropriate conditions, it has already been found by the present inventors that the dye molecules jump out of the source film surface without being decomposed and are injected into the target film. It has been found (Fukumura et al. Society of Polymer Science Spring Annual Meeting: May 1993, Photochemical Discussion Group: 1993 10
Moon).

[0004]

However, in the above method, there is a change in the color tone because the dye for transfer and the dye for light absorption, which is usually different in color tone from the dye, are also transferred.
Moreover, since it is essential to irradiate a pulsed laser beam with an intensity that decomposes the source film in order to decompose the resin, when transferred onto the target film, there is a change in the coating composition due to decomposition of the resin or dye, and the color tone is It has a defect that it is not transferred with good reproducibility. Due to these drawbacks, there are restrictions on printed image formation and production of color filters for display bodies such as liquid crystal displays.

Further, in the above method, since the dye is slightly diffused and injected into the target film in a non-uniform state, the reproducibility and homogeneity of the color tone are low, and it is difficult to form an image with a sharp contour. There were challenges.

[0006]

Means for Solving the Problems As a result of various studies, the present inventors have found a source film in which a dye is dispersed in an organic polymer compound, and a target film made of an organic polymer compound capable of transmitting laser light. When the source film in which the dye is dispersed by passing through the target film with a pulsed laser light having an intensity equal to or less than the ablation threshold of the source film, the dye is uniformly decomposed without being diffused, In addition, it can be efficiently injected into the target film and has high reproducibility and homogeneity of color tone, and it becomes possible to form images with clear contours, image formation such as printing, color filter creation for display such as liquid crystal display etc. The present invention has been completed and the present invention has been completed.

That is, according to the present invention, a source film (A) in which a dye capable of absorbing pulse laser light is dispersed in the organic polymer compound (a) and an organic polymer compound (b) capable of transmitting pulse laser light. The target film (B) is made to adhere to the target film (B), and the source film (A) is irradiated with pulsed laser light having an intensity equal to or lower than the ablation threshold of the source film (A). Injecting a dye in a source film (A) into a target film (B), and injecting a dye into a target film (B) using the above dye molecule injecting method. The image formation method characterized by forming an image by There is provided a color filter manufacturing method characterized by injecting a blue dye.

Hereinafter, the present invention will be described in detail. The organic polymer compound (a) used in the present invention is not particularly limited, and various organic polymer compounds can be used. Examples of the thermoplastic resin include olefin resins such as polyethylene, polypropylene, polybutene, polystyrene, and rubber modified. Styrene resins such as polystyrene (HIPS), acrylonitrile-styrene copolymer, acrylonitrile-butadiene-styrene copolymer, polymethylmethacrylate,
Acrylic resins such as methyl methacrylate-styrene copolymer and polyacrylonitrile, vinyl resins such as polyvinyl chloride, vinyl chloride-vinyl acetate copolymer, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl acetate copolymer, 6 -Polyamide resin such as nylon and 6,6-nylon, polyester resin such as polyethylene terephthalate and polybutylene terephthalate, fluorine resin, polycarbonate, polyacetal, polyphenylene ether, polyphenylene sulfide, polyether sulfone, polyether ketone, thermoplastic Examples of the thermosetting resin include polyimide resin, thermoplastic polyurethane, and the like. Examples of the thermosetting resin include phenol resin, urea resin, melamine resin, alkyd resin, thermosetting acrylic resin, unsaturated polyester resin, diazine resin. Rufutareto resins, epoxy resins, silicone resins, among which thermoplastic resins, thermoplastic resins of particular transparency preferred.
The organic polymer compound (a) may be used as a mixture of thermoplastic resins and thermosetting resins.

The organic polymer compound (b) used in the present invention is not particularly limited as long as it is an organic polymer compound capable of obtaining a film which can transmit pulsed laser light, and various organic polymer compounds can be used. In the thermoplastic resin, for example, low density polyethylene, olefin resin such as polypropylene, polystyrene, styrene resin such as acrylonitrile-styrene copolymer, polymethylmethacrylate, methyl methacrylate-styrene copolymer, acrylic resin such as polyacrylonitrile. ,PVC,
Vinyl resins such as vinyl chloride-vinyl acetate copolymer, polyvinylidene chloride, polyvinyl alcohol, ethylene-vinyl acetate copolymer, polyamide resins such as 6-nylon and 6,6-nylon, polyethylene terephthalate, polybutylene terephthalate Polyester resins such as polycarbonate, polyacetal, polyphenylene sulfide, thermoplastic polyimide, thermoplastic polyurethane, and the like, and also in the thermosetting resin, phenol resin, urea resin, melamine resin, alkyd resin, thermosetting acrylic resin, Unsaturated polyester resins, diallyl phthalate resins, epoxy resins and the like can be mentioned, and among them, thermoplastic resins are preferable. In addition, these organic polymer compounds (b) can also be used as a mixture of thermoplastic resins and thermosetting resins as long as transparency is not lost.

The dyes used in the present invention are not limited to the dyes used in the field of ordinary coloring materials, but are organic and inorganic solids at room temperature having an absorption maximum in the ultraviolet to near infrared region, preferably in the wavelength range of 190 to 1100 nm. Compounds. Examples of these organic compounds include condensed polycyclic aromatic compounds, heterocyclic compounds, sensitizing dyes for photopolymers, pigments, dyes, near infrared absorbing dyes, and dyes for laser oscillation. Exemplified, biphenyl, triphenyl, naphthalene, phenanthrene, anthracene, condensed polycyclic aromatic compounds such as pyrene, heterocyclic compounds such as carbazole, azo lake type, condensed azo type, phthalocyanine type, benzimidazolone type, quinacridone type, Isoindolinone-based, anthrapyrimidine-based, flavanthuron-based, perylene-based, perinone-based, quinophthalone-based, thioindigo-based, dioxazine-based, anthraquinone-based organic pigments and dyes, anthraquinone-based compounds, aminium-based compounds, polymethine-based compounds, Near-infrared absorbing dyes such as diimonium compounds, quinolinium compounds, indolium compounds, benzopyrylium compounds and dithionickel complexes, lasers of benzopyran compounds, quinolidine compounds, pyridinium compounds, xanthene compounds, benzothiazolium compounds, etc. Oscillation dye, and the like. For the purpose of making a color copy or a color filter, a pigment or dye having excellent transparency and a small particle size is preferable. To express RGB, red is an azo type, blue is a triphenylmethane type, and green is a green type. Is recommended to be a triphenylmethane-based or phthalocyanine-based compounding system with a yellow dye. Typical examples are red and CI 23635, Perman
ent Carmine, Permanent Red FGR, Thioindigo Red, Pe
rylene Scarlet, etc., as blue, CI 42655, CI 426
00, CI 44075, Phthalocyanine Blue, Indanthrene B
lue etc. as green, CI 44025 etc. as yellow, Anthra
Examples thereof include pirimidine Yellow and Hansa Yellow 10G, but the compounds are not limited to these exemplified compounds.
Examples of fluorescent dyes and pigments include phenylmethane-based, xanthene-based, thiazole-based, and thiazine-based fluorescent dyes, and Lumogen Color (BASF) fluorescent pigments.
Examples of the inorganic pigment include carbon black, titanium white, milori blue, cobalt violet, manganese violet, ultramarine blue, navy blue, cobalt blue, viridian, emerald green, cobalt green and the like.

The source film (A) used in the present invention may be a film in which a dye is dispersed in the above-mentioned organic polymer compound (a), and its production method is not particularly limited, but it is usually an organic polymer. A method of uniformly dispersing or dissolving a dye in an organic solvent solution in which the compound (a) is dissolved, casting or coating on a glass plate or a quartz plate, and then removing the organic solvent, the dye and the organic polymer compound (a) Is melt-kneaded and then formed into a film. At this time, the dye has an average particle diameter of 0.03 to 0.2 μm.
Disperse so as to be in the range of m. The concentration of the dye dispersed in the source film (A) may be 0.1% by weight or more, but is usually 0.3 to 50% by weight, preferably 0.5 to 10% by weight. The thickness of the film may be 0.1 μm or more, but is usually 1 μm to
It is 1 mm, preferably 1 to 100 μm.

As the target film (B), the organic polymer compound (b) which can transmit the above pulsed laser light
However, the production method is not particularly limited, and the production method is usually the same as that of the source film (A) described above except that the dye is excluded. Its thickness is also 0.
It may be 1 μm or more, and is usually appropriately selected from the range of 1 μm to 1 mm depending on the purpose of use and application.
The range of ˜100 μm is preferred.

When the source film (A) and the target film (B) are thin, they may be used in a state of being stuck on a substrate. However, as the substrate to which the target film (B) is attached, it is necessary to use a substrate capable of transmitting pulsed laser light, such as a glass plate or a transparent resin plate.

Examples of the pulsed laser light used in the present invention include pulsed laser light having an oscillation wavelength in the range of 190 to 1100 nm. The optimum wavelength differs depending on the type of organic polymer compound and dye used. The frequency of pulsed laser light is 0.5 to 50H
z, preferably 0.5 to 10 Hz, and the pulse width is
Depending on the wavelength of pulsed laser light and the type of dye, it is 10 ps to 10 μs, preferably 1 ns to 10 μs
Is. When using a laser beam having a long wavelength, shortening the pulse width is effective for suppressing the decomposition of the organic polymer compound or the dye.

As these pulsed laser light sources, for example, "How to Use Lasers for Utilizing Commercially Available Laser Devices and Points to Note", Yukichi Otake, Optronics, Inc. (198)
9) The lasers described on pages 346 to 351 can be used. Examples of these are ArF excimer laser (193 nm) and KrF excimer laser (248
nm), XeCl excimer laser (308 nm), X
eF excimer laser (351 nm), nitrogen laser (337 nm), dye laser (nitrogen laser, excimer laser or YAG laser excitation, 300 to 10)
00 nm), solid-state laser (Nd: YAG excitation, semiconductor laser excitation, etc.), ruby laser (694 nm), semiconductor laser (650-980 nm), tunable diode laser (630-1550 nm), titanium sapphire laser (Nd: YAG excitation, 345-500
nm, 690 to 1000 nm) or Nd: YAG laser (FHG; 266 nm, THG; 354 nm, S
HG; 532 nm, fundamental wave; 1064 nm) and the like.

In the present invention, it is essential that the source film (A) is irradiated with pulsed laser light having an intensity equal to or lower than the ablation threshold of the source film (A) through the target film (B). The ablation threshold value of the source film (A) here differs depending on the type of the source film (A) and the pulsed laser beam to be irradiated. That is, this ablation threshold value varies depending on the types of the organic polymer compound and the dye forming the source film (A) and the concentration of the dye, and also depends on the wavelength and pulse width of the pulsed laser light to be irradiated. . Therefore, the ablation threshold value of the source film (A) cannot be uniquely defined for the source film (A). In the present invention, the same source film (A) used in the present invention is irradiated with the same pulsed laser light for one shot, and the film (A) is contact-type surface shape measuring apparatus (for example, DEKTAK3030ST manufactured by SLOAN). ), The minimum laser light intensity (mJ / cm ² ) on the irradiation surface where morphological change of 0.1 μm or more may occur on the irradiation surface of the laser light is ablated by the source film (A) used in the present invention. Defined as a threshold value.

As an example of this ablation threshold value, the wavelength is 248 nm, the pulse width is 30 ns, and the beam diameter is 2.
3% by weight of anthracene with x5 mm excimer laser light
When the polymethylmethacrylate (PMMA) film having a thickness of 2 μm dispersed therein is irradiated once, the ablation threshold of the film is 60 mJ / cm ² , and the wavelength is 35.
When the PMMA film similar to the above is irradiated once with an excimer laser beam of 1 nm, a pulse width of 30 ns, and a beam diameter of 2 × 5 mm, the ablation threshold of the film is 40.
0 mJ / cm ² , wavelength 248 nm, pulse width 30 n
s, the ablation threshold of the film is 75 mJ / cm ² , when the excimer laser beam with a beam diameter of 2 × 5 mm is irradiated once to a 2.5 μm thick PMMA film in which 3.5% by weight of pyrene is dispersed. When an excimer laser beam having a beam width of 2 × 5 mm with a pulse width of 351 nm, a pulse width of 30 ns, and a 2.5 μm-thick PMMA film in which 3% by weight of tetra-t-butylcopper phthalocyanine is dispersed is irradiated once, the ablation threshold of the film is 100 mJ. / C
m ² .

The method for injecting a dye molecule according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing an example of the present invention, where (A) is a source film, (B) is a target film, (C) is a dye, (D) is pulsed laser light, and (E) is transparent. Substrate, (F) is a substrate, (G) is an arrow indicating the direction of injection of the dye (C) into the target film (B).

In FIG. 1, the source film (A) is
A film in which a dye (C) capable of absorbing pulsed laser light (D) is dispersed in the organic polymer compound (a), and the target film (B) is a film composed of the organic polymer compound (b). When the film thicknesses are small, they are attached to substrates (E) and (F) such as a glass plate, a metal plate, and a resin plate, and the surfaces of both films are in direct contact with each other and are placed in close contact with each other. There is. The intensity of the pulsed laser light (D) is equal to or lower than the ablation threshold value of the source film (A), and preferably 7 or less.
It has a strength of 0% or more, is transmitted through the target film (B), and is irradiated onto the source film (A). The number of irradiations of the pulsed laser light (D) is not particularly limited, but is usually 1 to 50 times, and among them, the diffusion of the dye (C) injected into the target film (B) is small,
It is preferably 1 to 25 times because the dye can be injected at a uniform concentration. When the source film (A) is irradiated with the pulsed laser light (D), the source film (A) absorbs the pulsed laser light (D), and the dye (C) remains in a state of having high translational kinetic energy without being decomposed. From the surface of (A), it is uniformly injected into the target film (B) which is in close contact as shown by the arrow (E). The injection depth of the dye (C) is usually about 10 to 300 nm, and after removing the dye (C) attached to the surface of the target film (B) without being injected by washing with a solvent or the like, the target film It can be measured by observing the cross section of (B) with, for example, a transmission electron microscope.

To form an image using the dye molecule injection method of the present invention, for example, the spot diameter of the pulse laser beam (D) is adjusted according to the image to be formed, and the position of the spot and / or the source. A method of moving the positions of the film (A) and the target film (B) can be mentioned. At this time, the source film (A) in which different dyes are dispersed may be sequentially used.

Further, in order to produce a color filter by using the method for injecting a dye molecule according to the present invention, for example, the dye group is selected according to the desired color tone for a desired color filter for a liquid crystal display or a cathode ray tube display. Three kinds of source films (A) in which the selected dyes of three primary colors of blue, green, and red are dispersed in the organic polymer compound (a), that is, a blue source film, a green source film, and a red color The source film and the target film are sequentially brought into close contact with the target film (B) one by one, and then the target film (B) is transmitted in a pattern for a color filter to irradiate the source film (A) with a pulsed laser beam (D). Then, a manufacturing method or the like in which the above three kinds of dyes are injected into the target film (B), respectively.

The dye for the color filter to be injected may be selected from the above dye group, but it is light-resistant to a cold cathode ray which is a transmissive light source when a display is used, an EL or other illuminant, and ITO is transparent on the color filter by a sputtering method or the like. Pigment-based dyes having excellent heat resistance when forming an electrode are preferable. For example, for blue pigments, Dainippon Ink's phthalocyanine (Fastgen-TGR-L) and for green pigments, Dainippon Ink's chlorinated phthalocyanines (Fastgen). Examples of green S) and red pigments include quinacridone (Fastgen Super Red 7061B) manufactured by Dainippon Ink.
As the dyes representing the three primary colors, one of blue, green, and red is appropriately selected, but for color correction, other dyes such as yellow and purple may be used in combination as complementary colors.

The organic polymer compound used for the source film (A) is appropriately selected from the above-mentioned organic polymer compounds (a), but among them, thermoplastic resins, particularly thermoplastic resins having high transparency are preferable. Specific examples thereof include acrylic resins, polycarbonate resins, polyester resins and the like. The source film (A) can be obtained by, for example, a method in which the dye and the organic polymer compound (a) are melt-kneaded and then cast on a glass substrate to form a film.
The concentration of the dye (C) dispersed in the source film (A) may be 0.1% by weight or more, but is preferably 1 to 10% by weight in the production of a color filter.

The target film (B) is appropriately selected from the above organic polymer compounds (b), but a thermoplastic resin having a particularly high transparency is preferable from the viewpoint of excellent color tone of the dye pixels of the color filter prepared, Representative examples include acrylic resins, polycarbonate resins, polyester resins, and the like. As the target film (B), the organic polymer compound (b) is dissolved in a solvent and spin coated on a glass substrate, or the like, preferably 1 to 10
A film formed with a film thickness of μm is preferable.

In the method for producing the color filter of the present invention, as a method of irradiating pulse laser light (D) in a pattern for the color filter to inject the above-mentioned three kinds of dyes into the target film (B), respectively. For example, a photomask prepared according to the pixels of the color filter is attached to the outside of the target film (B) (opposite side of the source film), and the pulsed laser light (D) is applied to the target film (B) through the photomask. The source film (A) that is in close contact with the target film is irradiated by the scanning scanning method, and three types of blue, green, and red are sequentially injected into the target film. The pulse laser control system is adjusted in advance according to the dot pattern of the color filter. Enter the laser light irradiation position and the number of irradiations in advance, and format it. Therefore, the source film (A) closely attached from the side of the target film (B) is irradiated with the pulsed laser light (D), preferably the pulsed laser light condensed by a lens or the like, to sequentially produce blue, green and red. A method of injecting the seed into the target film may be mentioned, and the method among them is preferable.

The number of irradiations of the pulse laser beam (D) is 10 to 20 in that the dye injected into the target film (B) is less diffused and the dye can be injected at a high uniform concentration.
Times are preferred.

On the target film (B) thus injected with the dye (C), an ITO transparent electrode is formed by a sputtering method or the like to finally form a color filter.

[0028]

EXAMPLES The present invention will be described in more detail below with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

Example 1 Polymethylmethacrylate containing 2.5% by weight of pyrene (fluorescent dye) as a dye was dissolved in 1,1,2-trichloroethane and then coated on a glass substrate by spin coating to give 1 , 1,2-Trichloroethane was removed by heating and drying to obtain a source film having a thickness of 2.5 μm on a glass substrate.

Then, in the same manner as above, except that pyrene was not added, a thickness of 2.5 μm made of polymethylmethacrylate was obtained.
m target film was obtained on a glass substrate. The source film and the target film on the glass substrate are brought into close contact with each other, and excimer laser light (wavelength 248 nm, pulse width 30 ns, beam diameter 2 × 5 mm, irradiation intensity 65 mJ / cm ² ) is applied from the substrate side of the target film at 1 Hz.
It was irradiated 5 times.

After the target film was peeled from the source film and the surface of the target film on which the dye was injected was washed with ethanol, the cross section of the target film was observed with a transmission electron microscope. As a result, pyrene was found to have a depth of about 25 nm. It was injected evenly. Also, the contour of the injected dye was clear.

Comparative Example 1 As Example 1 except that glass fibers having a diameter of 20 μm were inserted as a spacer between a source film and a target film on a glass substrate, and both films were placed in contact with each other at an interval of 20 μm without being brought into close contact with each other. Similarly, a target film in which pyrene was injected was obtained. Then, when the cross section of the target film was observed in the same manner, the injection depth of pyrene into the target film was nonuniform, 20 to 25 nm, and the outline of the injected dye was larger than that of Example 1 above. It was clearly unclear.

Example 2 Polymethylmethacrylate containing 3% by weight of tetra-t-butylcopper phthalocyanine as a dye was dissolved in dichloromethane and applied on a glass substrate by a casting method, and then dichloromethane was dried and evaporated to give a thickness of 2.5 μm. The source film of was obtained on a glass substrate.

Then, a target film made of polymethyl methacrylate and having a thickness of 2.5 μm was obtained on a glass substrate in the same manner except that tetra-t-butyl copper phthalocyanine was not added.

The source film and the target film on the glass substrate are brought into close contact with each other, and the excimer laser light (wavelength 351 nm, pulse width 30 ns, beam diameter 2 × 5 mm, irradiation intensity 80 mJ is applied from the substrate side of the target film.
/ Cm ² ) was irradiated 10 times at 10 Hz.

After the target film was peeled from the source film and the surface of the target film on which the dye was injected was washed with ethanol, the cross section of the target film was observed with a transmission electron microscope. As a result, tetra-t-butyl copper phthalocyanine was found to be present on the target film. It was uniformly implanted at a depth of about 100 nm. Also, the contour of the injected dye was clear.

Example 3 A sample was prepared by closely adhering a source film and a target film on a glass substrate obtained in the same manner as in Example 2, and the movement of the sample was synchronized with the oscillation frequency of laser light by computer control. However, the excimer laser beam (wavelength 351 nm, pulse width 30 ns, irradiation intensity 80 mJ / cm ² ) focused on the substrate side of the target film to a beam diameter of 10 μm was applied at 1 Hz at 10 Hz for each dot.
While irradiating 0 times, the sample was moved in parallel to form a linear image. This image had a sharp outline.

Example 4 As a blue pigment, 5 parts by weight of Phthalocyanine (Fastgen Blue TGR-L) manufactured by Dainippon Ink and 95 parts by weight of polymethylmethacrylate were melted and kneaded by heating, dissolved in 1,1,2-trichloroethane, and then dissolved. After coating on a glass substrate by a casting method, it was dried by heating to remove 1,1,2-trichloroethane to obtain a blue pigment-containing source film having a thickness of 10 μm. Using the same method, instead of chlorinated phthalocyanine (Fastgen Green S) manufactured by Dainippon Ink Co., Ltd. as a green pigment and quinacridone (Fastgen Super Red 7061B) manufactured by Dainippon Ink Co., Ltd. as a red pigment, a green pigment-containing source film and A red pigment containing source film was prepared. Next, polymethylmethacrylate is dissolved in 1,1,2-trichloroethane, coated on a glass substrate by a casting method, and then heated to give 1,1,2-
Trichloroethane was evaporated to obtain a target film having a thickness of 3 μm.

A sample was prepared in which the source film containing the blue pigment was brought into close contact with the target film, and excimer laser light (wavelength 351 nm, pulse width 30 ns) focused on the beam diameter of 10 μm from the side of the target film was applied to the source film containing the blue pigment. Ablation threshold of 75
The intensity of the sample is controlled by a computer to synchronize the movement of the sample with the oscillation frequency of the laser light and irradiate according to the blue dot pattern of the color filter.
A blue dot pattern was obtained.

Then, the blue pigment-containing source film was replaced with the target film, and the green pigment-containing source film was used. With the intensity of 85% of the ablation threshold of the green pigment-containing source film, green dots were similarly formed on the target film. A pattern was obtained, and the ablation threshold value of the red pigment-containing source film was 75 in the same manner.
% Intensity gave a red dot pattern on the target film.

Thus, blue, green,
It was possible to obtain a color filter excellent in color tone reproducibility by arranging the mosaic colored dot patterns of the three primary colors of red with high accuracy.

Furthermore, when an ITO film was formed on the surface of this color filter by a sputtering method and the ITO film was patterned by a conventional method, a lead wire pattern having a line width of 10 μm could be formed with good reproducibility.

[0043]

According to the dye molecule injection method of the present invention,
The dye remains undegraded and can be uniformly and efficiently injected into the target film without diffusion, resulting in high reproducibility and homogeneity of color tone, and the formation of sharp contour images.
It can be used for image formation such as printing and for making color filters for displays such as liquid crystal displays.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing an example of a method for injecting a dye molecule according to the present invention.

[Explanation of symbols]

A: Source film B: Target film C: Dye D: Pulsed laser light E: Transparent substrate F: Substrate G: Arrow indicating the direction of injection of the dye (C) into the target film (B)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Park Kengquan 3-4-5 Osakidai, Sakura City, Chiba Prefecture (72) Inventor Hiroshi Fukumura 2-11-842 Kinnohonmachi, Hirakata City, Osaka Prefecture (72) Inventor Hiroshi Masuhara 2-4-16 Minamikonoike-cho, Higashi-Osaka City, Osaka Prefecture

Claims (12)

[Claims] 1. A target film comprising a source film (A) in which a dye capable of absorbing pulse laser light is dispersed in an organic polymer compound (a) and an organic polymer compound (b) capable of transmitting pulse laser light. (B) is brought into close contact with the source film (A) and pulse laser light having an intensity equal to or lower than the ablation threshold of the source film (A) is transmitted through the target film (B) to irradiate the source film (A).
A method for injecting a dye molecule, which comprises injecting a dye in a source film (A) into a target film (B). 2. The molecular injection method according to claim 1, wherein the intensity of the pulsed laser light is 70% or more of the ablation threshold of the source film (A). 3. The wavelength of the pulsed laser light is 190 to 1
The molecular injection method according to claim 1, which has a thickness of 100 nm. 4. The frequency of the pulsed laser light is 0.5 to
The molecular injection method according to claim 2 or 3, wherein the frequency is 10 Hz. 5. The pulse width of the pulsed laser light is 1 ns
The molecular injection method according to claim 2 or 3, wherein the molecular injection method is from 10 µs. 6. The molecular injection method according to claim 1, wherein the source film (A) and the target film (B) are films made of the same kind of organic polymer compound. 7. The molecular injection method according to claim 1, wherein the organic polymer compound (a) is a thermoplastic resin. 8. The molecular injection method according to claim 7, wherein the organic polymer compound (b) is a thermoplastic resin. 9. The molecular injection method according to claim 1, wherein the content of the dye in the source film (A) is 0.3 to 50% by weight. 10. The coloring matter is a pigment or a dye.
The described molecular injection method. 11. An image forming method, wherein an image is formed by injecting a dye into a target film (B) using the molecular injection method according to any one of claims 1 to 10. 12. A method for producing a color filter, which comprises injecting red, green and blue dyes into a target film (B) by using the molecular injection method according to any one of claims 1 to 10. .