JPH05241168A - Production of liquid crystal panel - Google Patents

Abstract

PURPOSE:To improve a complicated process for temporary sticking with a UV-curing agent and to prevent deterioration of a sealing agent or damages in a driving element by using a sealing agent as a temporary adhesive and curing the sealing agent with laser light. CONSTITUTION:First, a sealing agent 8 is applied on both of the sealing part 3 and the temporary sticking part 9 of a driving element substrate 1 by printing, then a gap agent is sprayed, and then the sealing agent 8 is prebaked. Next, the driving element substrate 1 and a filter substrate 2 are laminated with the sealing agent 8 and the gap agent interposed and aligned on alignment marks to assemble a laminated substrate 5. Then the sealing agent 8 in the temporary sticking part 9 is heated and calcined by irradiation of laser light 4 for temporary fixing of the driving element substrate 1 and the filter substrate 2. Or, without providing the laminated substrate 5 with new temporary sticking part, the sealing agent 8 applied on the sealing part 3 by printing may be heated and calcined by scanning laser light along the sealing part 3 for temporary fixing.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a liquid crystal panel, and more particularly to a method for manufacturing an active matrix liquid crystal panel.

[0002]

2. Description of the Related Art As shown in FIG. 3, a temporary fixing method in a conventional liquid crystal panel manufacturing method includes a step of seal printing a sealant 8, a step of spraying a gap agent, and a calcination of the sealant 8 (leveling, degassing). ) Drive element substrate 11 after the steps
Then, the UV curing agent 7 is applied to either one of the filter substrate 12 and the filter substrate 12, the drive circuit element substrate 11 and the filter substrate 12 are overlapped with each other, alignment is performed with alignment marks, and then the UV light 6 is UV cured. It was the method of irradiating the agent 7. By performing the temporary fixing, the pattern displacement due to the impact when the driving element substrate 11 and the filter substrate 12 that are superposed are handled and the lateral displacement that occurs when the jig used for firing the sealant 8 is pressed is prevented.

[0003]

In the conventional temporary fixing method in the conventional liquid crystal panel manufacturing method, it is necessary to apply a UV curable material for temporary fixing in addition to the sealant, and the steps such as controlling the application amount are complicated. There is a problem that

Further, when the UV curing agent is mixed with the sealant, the sealant is melted and deteriorated, and the UV light damages the driving element, so that there is a problem that the application position is limited.

An object of the present invention is to provide a method for manufacturing a liquid crystal panel, which improves a complicated temporary fixing process using a UV curing agent, prevents deterioration of a sealant and damages of a driving element, and obtains a highly reliable liquid crystal panel. To provide.

[0006]

According to the method of manufacturing a liquid crystal panel of the present invention, a step of assembling a superposed substrate by superposing a drive element substrate and a filter substrate via a sealant and a gap agent applied to a seal portion. And a step of irradiating the sealing agent of the superposed substrate with a laser beam, heating and firing to temporarily fix the sealing agent.

[0007]

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

FIG. 1 is a perspective view of a laminated substrate for explaining the temporary fixing process of the first embodiment of the present invention.

In the first embodiment, as shown in FIG. 1, first, the seal agent 8 is seal-printed on the seal portion 3 of the drive element substrate 1, and at the same time, the seal agent 8 is seal-printed on the temporary fixing portion 9 as well. After spraying the agent, the sealant 8 is calcined.

Next, the drive element substrate 1 and the filter substrate 2 are aligned with each other through the sealant 8 and the gap agent, and alignment is performed with alignment marks to assemble the superimposed substrate 5.

Next, the sealant 8 of the temporary fixing portion 9 is irradiated with laser irradiation light 4 to heat and seal the sealant 8 to temporarily fix the drive element substrate 1 and the filter substrate 2.

After that, the liquid crystal panel according to the first embodiment is obtained through the same manufacturing process as the conventional one.

FIG. 2 is a perspective view of a laminated substrate for explaining the temporary fixing process of the second embodiment of the present invention.

In the second embodiment, as shown in FIG. 2, a sealing agent 8 printed on the seal portion 3 is applied along the seal portion 3 without newly providing a temporary fixing portion on the superposed substrate 5. In this example, the laser light is scanned, heated and fired to temporarily stop.

The other steps are the same as in the first embodiment, and the same effects as in the first embodiment can be obtained.

[0016]

As described above, according to the present invention, since the sealant is used as the adhesive for temporary fixing, the step of applying the adhesive such as the UV curing agent and the step of removing the gas harmful to the liquid crystal. Since the sealant is hardened by using laser irradiation light as a light source having good directivity and light condensing property, the driving element is not damaged even when used near the driving element. Therefore, the irradiation position is not restricted, and since the sealant can perform printing, there is an effect that the film thickness can be made relatively uniform.

[Brief description of drawings]

FIG. 1 is a perspective view of a laminated substrate for explaining a temporary fixing process of a first embodiment of the present invention.

FIG. 2 is a perspective view of a laminated substrate for explaining a temporary fixing process of the second embodiment of the present invention.

FIG. 3 is a cross-sectional view illustrating an example of a temporary fixing step of a conventional liquid crystal panel manufacturing method.

[Explanation of symbols]

 1, 11 Driving element substrate 2, 12 Filter substrate 3 Sealing part 4 Laser irradiation light 5 Laminated substrate 6 UV light 7 UV curing agent 8 Sealing agent 9 Temporary fixing part

Claims (1)

[Claims] 1. A step of assembling a superposed substrate by superposing a drive element substrate and a filter substrate through a sealing agent and a gap agent applied to a sealing portion, and a laser beam is applied to the sealing agent of the superposed substrate. A method of manufacturing a liquid crystal panel, comprising the steps of: irradiating, heating and baking to temporarily fix.