JPH11312468A - Plasma display substrate and method of manufacturing the same - Google Patents

Abstract

[PROBLEMS] To provide a plasma display substrate with a small amount of lead glass waste, particularly in a plasma display substrate formed with ribs by a sandblast method. A rib formed on a substrate has a structure in which a molded body made of an inorganic oxide is covered with lead glass.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plasma display substrate, and more particularly to a structure of a rib formed on the plasma display substrate.

[0002]

2. Description of the Related Art In recent years, as a large screen flat display,
2. Description of the Related Art A plasma display (hereinafter, referred to as a PDP) has attracted attention, and a thick film forming technique such as screen printing is often used for its manufacture.

[0003] A PDP is composed of two substrates.
As shown in FIG. 1, a rib 20 is formed on one of the substrates 10. (Note that an electrode and a dielectric are actually formed, but are omitted in the drawing).

As shown in FIG. 1, a generally used rib has a structure in which an inorganic oxide 30 is connected with a lead glass 40 to be integrated. In a specific manufacturing method, first, fine powder of a rib-forming material, that is, an inorganic oxide and lead glass is kneaded with an appropriate resin and a solvent to form a paste. In general, the paste is processed into a rib shape by a predetermined method, and then fired to melt the lead glass powder, thereby joining the inorganic oxides and integrating them. The resin and the solvent are removed by evaporation or combustion by the heat applied up to this step.

[0005] There are several methods for forming such ribs, but at present, the sand blast method is mainly used (for a known example, see Kameya Monthly LCD Intelligence, August 1997). No. 57, etc.).

In the sand blast method, a rib is formed by applying a rib forming material to a predetermined thickness on a substrate, masking a necessary portion, and blowing sand onto the portion to remove an unnecessary rib forming material. Is the way.

[0007]

The lead glass used for the rib is a harmful substance. Therefore, strict management is required for its use and disposal, which contributes to an increase in manufacturing costs. However, they are still used today as there are no suitable alternatives. Therefore, it is desirable that its use be as small as possible, in particular as little as possible as waste.

[0008] However, waste is always produced in the rib making process. In particular, when the ribs are manufactured by a sandblast method, most of the rib forming material is waste because the ribs are manufactured by so-called shaving.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem, and an object of the present invention is to reduce the amount of lead glass which becomes waste when ribs are formed, particularly when ribs are formed by a sand blast method. And a method of manufacturing the same.

[0010]

Means for Solving the Problems A first invention of the present invention is:
In a plasma display substrate, a substrate, a molded body formed of a columnar inorganic oxide disposed on the substrate, and lead glass on the surface of the molded body or the entire surface of the substrate on which the molded body is arranged are formed. A plasma display substrate comprising:

According to a second aspect of the present invention, there is provided a method of manufacturing a plasma display substrate according to the first aspect, wherein a molded body made of an inorganic oxide is formed by a sandblast method.

[0012]

FIG. 2 is a block diagram showing an embodiment of the present invention.
This will be described in detail with reference to FIG. Although electrodes and dielectrics are formed on the actual substrate 10 in addition to the ribs, they are not shown in the figure for simplicity.

First, as shown in FIG. 2, a rib-shaped molded body 30 is formed on a substrate 10 using an inorganic oxide. The molded body is fired in the next step. For this reason, if it can be eliminated by firing, it may include an organic binder 45 for improving the formability. In addition, in addition to the sandblasting method, a known method such as a screen printing method and a photosensitive paste method can be used for forming the molded body.

Next, as shown in FIG. 3, a lead glass paste 50 kneaded with lead glass and an appropriate resin and solvent.
By a known method such as screen printing.
Apply on top.

The lead glass paste may be applied selectively on the molded body 30 or may be applied on the entire surface of the substrate. In FIG. 3, the coating is performed on the entire surface of the substrate.

After drying, the lead glass is melted by firing at an appropriate temperature to form a rib 20 coated with an inorganic oxide and lead glass as shown in FIG.

As a result, even if ribs are produced by, for example, sandblasting, only the inorganic oxide of the rib-forming material is formed into a rib shape, and lead glass is not contained as waste in this step. . Since the lead glass is used only in the lead glass paste application step, the amount of lead glass as waste can be reduced.

[0018]

EXAMPLES First, an inorganic oxide paste was prepared. Inorganic oxide (Black inorganic pigment # 3247 manufactured by Asahi Sangyo) 95
1 part of ethyl cellulose (manufactured by Kanto Kagaku) and 4 parts of butyl carbitol (manufactured by Kanto Kagaku) were added to the resulting mixture to form a paste.

Next, the inorganic oxide paste is repeatedly printed and dried on the glass substrate on which the electrodes and the dielectric layer are formed in advance by a screen printing method using screen printing, so that the inorganic oxide paste has a thickness of 200 μm.
It was applied to a thickness of μm.

A dry film resist for sandblasting (ORDY manufactured by Tokyo Ohka Kogyo Co., Ltd.) is formed on the laminated paste.
LBF-603 T-3) was laminated using a laminator under the conditions of a roll temperature of 105 ° C., a pressure of 2.5 kg / cm ² , and a feed speed of 1.0 m / min.

After lamination, the dry film resist was exposed at a light exposure of 400 mj / cm ² using a photomask having a line pattern opening having a width of 80 μm and a pitch of 420 μm and an ultrahigh pressure mercury lamp with an output of 5 kW.

After the exposure, a resist pattern having a width of 80 μm was formed by spray development using a 0.2% aqueous sodium carbonate solution at a temperature of 30 ° C. and a pressure of 1.5 kg / cm ² .

After the formation of the resist pattern, sand (S4 # 60 manufactured by Fuji Manufacturing Co., Ltd.)
0) was sprayed onto the substrate at a pressure of 0.25 MPa to scrape off the portion of the inorganic oxide paste where no resist pattern was formed.

Thereafter, a dry film resist stripper (BF manufactured by Tokyo Ohka Kogyo Co., Ltd.) in which the entire substrate was heated to 40 ° C.
The dry film resist was stripped by immersion in stripper B), washed with water and dried to produce a rib-shaped molded body 30 made of an inorganic oxide paste as shown in FIG.

Next, as shown in FIG. 3, a lead glass paste 50 (PLS-3162S manufactured by NEC Corporation) was applied onto the molded body 30 using a 300 mesh polyester screen plate.

After drying, the resultant was fired at 580 ° C. to obtain a plasma display substrate having a rib 20 having a structure in which a molded body 30 made of an inorganic oxide was covered with lead glass 40 as shown in FIG.

[0027]

As described above, according to the present invention,
Of the lead glass and the inorganic oxide constituting the rib, only the inorganic oxide is formed into a rib shape. And lead glass is used only for a lead glass paste application process. For this reason, even if a rib-shaped molded body is produced by, for example, a sandblast method, lead glass is not included as waste in this step. Therefore, it was possible to provide a plasma display substrate having a small amount of lead glass used and a small amount of waste in the production thereof.

[0028]

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a general plasma display substrate.

FIG. 2 is a cross-sectional view of a substrate after a rib shape forming step using an inorganic oxide according to one embodiment of the present invention.

FIG. 3 is a cross-sectional view of a substrate after a lead glass paste application step according to one embodiment of the present invention.

FIG. 4 is a cross-sectional view of a plasma display substrate according to one embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Glass substrate 20 ... Rib 30 ... Molded body 40 ... Lead glass 45 ... Organic binder 50 ... Lead glass paste

Claims (2)

[Claims] 1. A plasma display substrate, comprising: a substrate; a molded body disposed on the substrate and formed of a columnar inorganic oxide; and a surface of the molded body or a surface of the entire substrate on which the molded body is disposed. A plasma display substrate, comprising: a thin film made of lead glass. 2. A method for manufacturing a plasma display substrate according to claim 1, wherein a formed body made of an inorganic oxide is formed by a sandblast method.