JPH06150812A - Pattern formation for plasma display board - Google Patents

Abstract

PURPOSE:To provide fine line width, and allow no trouble occurrence such as transmittance deterioration, peeling, and the like in a pattern formation of electrodes and barriers on a glass board through screen printing. CONSTITUTION:On a glass board 1 a back layer 3 made of an organic high polymer compound is formed, and thereon paste 4 to be electrodes or barriers is printed in a pattern by screen printing. Thereafter the back layer 3 is burnt out in a following burning process. The back layer 3 prevents the line width of the paste 4 from expanding. As the back layer 3 burns out finally, the transmittance of the glass board 1 is maintained, and the pattern 5 formed of the paste 4 is not allow to peel out of the glass board 5.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pattern forming method by screen printing, and in particular, plasma for forming electrodes and barriers on a glass substrate which is a front plate or a rear plate of a plasma display panel. The present invention relates to a pattern forming method for a display substrate.

[0002]

2. Description of the Related Art Conventionally, a screen printing method has been used as a method for forming a thick film pattern on a substrate. For example, in a plasma display panel, this screen printing method is used to form patterns such as electrodes and barriers on a glass substrate that is a front plate or a back plate. When forming a pattern by screen printing on a glass substrate, the most common method is to print the paste directly on the glass surface, but to prevent the line width from increasing, an underlayer of glass paste is provided. The method of printing on it is also adopted. In addition, in order to maintain the shape at the time of printing, a method of using a paste having characteristics such as thixotropic property added to the printing paste itself is also adopted.

[0003]

However, among the above-mentioned conventional methods, the method of directly printing the paste on the glass surface has problems such as enlargement of the line width and pattern blurring. On the other hand, in the method of providing the underlayer with the glass paste, the transmittance is reduced due to the underlayer, which may adversely affect the subsequent steps or products, and there is a problem that the usable range is limited. Further, when an electrode material or the like is printed on top of it, there is a problem that peeling or a decrease in resistance value is caused due to a difference in expansion coefficient. In addition, even in the method of imparting thixotropic properties to the paste itself to be printed, the type of paste that can be produced is limited or the effect is limited due to the decrease in printability, the resistance value, and the relationship with other properties such as transmittance. There is a problem that there are few.

The present invention has been made in view of the above problems, and an object of the present invention is that the line width accuracy is good, and the problems such as reduction in transmittance and peeling do not occur. Another object of the present invention is to provide a pattern forming method for a plasma display substrate.

[0005]

In order to achieve the above-mentioned object, a method for forming a pattern of a plasma display substrate according to the present invention comprises an organic polymer compound on a glass substrate which is a front plate or a back plate of a plasma display panel. Is formed, and a paste serving as an electrode or a barrier is printed on the underlayer in a pattern by screen printing, and then the underlayer is burned off in the subsequent firing step.

[0006]

In the pattern forming method having the above-mentioned structure, the underlayer made of the organic polymer compound provided on the glass substrate in advance plays a role of preventing the line width of the paste to be printed thereon from expanding. . Then, the base layer is burned and removed in the subsequent firing step, whereby the transmittance of the glass substrate is maintained and the pattern formed by the paste does not peel off from the glass substrate.

[0007]

Embodiments of the present invention will now be described in detail with reference to the drawings.

FIG. 1 is a process chart showing an embodiment of the present invention, showing a process of forming electrodes on a front plate constituting a plasma display panel.

First, as shown in (a), a base material 2 made of an ethylcellulose solution is screen-printed on a glass substrate 1 which is a front plate. The ethyl cellulose solution used here is a solution of ethyl cellulose (N-200, manufactured by Hercules Co., Ltd.) dissolved in terpineol so that the solid content is 5 wt%, but butyl carbitol acetate is used in addition to terpineol. Good.

After that, it is dried in an oven at 170 ° C. for 15 minutes. As a result, the film thickness of about 15 μm immediately after printing was reduced to about 5000 to 8000Å, and the underlayer 3 was formed on the substrate 1 as shown in (b).

Next, as shown in (c), a plurality of stripe-shaped patterns are formed on the underlayer 3 by the paste 4 serving as an electrode, with a width of 100 μm, a film thickness of 15 μm, and a pitch of 0.5.
Form in parallel with mm. In this embodiment, the nickel paste (Dupont) is used in terms of cost, stability, and resistance.
Manufactured by K.K., product number 9536D) was used.

Then, after drying in an oven at 170 ° C. for 15 minutes, firing is performed in a firing furnace at a peak temperature of 580 ° C. for 30 minutes to obtain organic components contained in the paste 4 and ethyl cellulose as the base layer 3. Was burned off to form an electrode 5 on the substrate 1.

When the line width of the electrode 5 formed as described above was measured, the average line width was 105 μm. On the other hand, when the paste 4 was directly printed on the glass substrate 1, the average line width was 180 μm.

In this way, the line width after forming the electrode 5 was very small, and a good pattern could be formed without deterioration of the transmittance and peeling.

In the above embodiment, screen printing was used as the means for forming the underlayer, but it goes without saying that other means such as a roller coater can be used.

[0016]

As described above, according to the method for forming a pattern of a plasma display substrate of the present invention, an underlayer made of an organic polymer compound is previously provided on a glass surface forming an electrode or a barrier, and screen printing is performed thereon. Thus, the underlying layer is burned off in the subsequent firing step, so that a good pattern can be formed without causing problems such as expansion of line width, reduction of transmittance and peeling.

[Brief description of drawings]

FIG. 1 is a process drawing showing an embodiment of a thick film pattern forming method according to the present invention.

[Explanation of symbols]

 1 glass substrate 2 base material 3 base layer 4 paste 5 electrode

Claims (1)

[Claims] 1. A base layer made of an organic polymer compound is formed on a glass substrate to be a front plate or a back plate of a plasma display panel, and a paste serving as an electrode or a barrier is patterned on the base layer by screen printing. A method for forming a pattern on a plasma display substrate, which comprises burning the base layer in a subsequent firing step after printing in a pattern.