JPS62264027A - Production of liquid crystal display element - Google Patents

Abstract

PURPOSE:To prevent the generation of static electricity on an element by forming a conductive member on the outside periphery of a glass substrate before the rubbing treatment. CONSTITUTION:Before the rubbing treatment, an outside conductive film 30 is formed on the outside periphery of a glass substrate 4. Concretely, it is preferable that the film 30 is formed simultaneously with vapor-deposition of a transparent conductive film 3 on the photo glass substrate 4. That is, the outside conductive film 30 is vapor-deposited simultaneously with vapor-deposition of the transparent conductive film 3 if a pattern of the transparent conductive film 3 and that of the outside conductive film 30 are preliminarily formed on a photo mask. Since the occurrence of creeping discharge in the part of the transparent conductive film 3 is surely prevented, defects of orientation of the liquid crystal due to destruction of an oriented film is prevented and the quality of products is improved to improve the reliability.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for manufacturing a liquid crystal display element, and particularly to a method for preventing the generation of static electricity on a glass substrate during the manufacturing process.

[Conventional technology]

Conventionally, in order to manufacture a liquid crystal display element, first, as shown in FIG. 5, a transparent conductive film 3 is deposited on a glass substrate 4 placed on a metal machine bed 6, and then etched into an arbitrary pattern. After that, a polymer alignment film 2 for aligning liquid crystal molecules is applied. Next, this polymer alignment film 2 is rubbed with a chemical fiber such as polyester or nylon in order to align the liquid crystal molecules in a certain direction. After rubbing, a peripheral sealing material is printed on the glass substrate 4, and in the same manner as above, the glass substrate on which the transparent conductive film 3 and the polymer alignment film 2 have been formed is superimposed on the glass substrate 4 shown in FIG. Glue the glass substrate.

After that, liquid crystal is injected into the space surrounded by both glass substrates.

[Problem that the invention seeks to solve]

In the above conventional process, when rubbing the polymer alignment film 2, a negative charge is generated on the glass substrate 4, which is an insulator, so the glass substrate 4 is taken up from the machine bed 6 in order to be transferred in the next process. Sometimes, due to electrostatic induction effect,
Electrical discharge occurs from the glass substrate 4 charged to V to the bed 6 of the machine and the operator's hands. Also, during this discharge, the sixth
As shown in the figure, a segment electrode 3A is a transparent conductive film 3.

Creeping discharge occurs even at the location where 3B is closest, and this discharge may damage the polymer alignment film 2 and cause alignment failure of the liquid crystal.

The present invention was made in order to prevent static electricity from being generated in the liquid crystal display element during the manufacturing process of the liquid crystal display element as described above.

[Means for solving problems]

Therefore, in the present invention, a transparent conductive film and an alignment film are provided on two glass substrates, and after the alignment film is rubbed, liquid crystal is injected into the space surrounded by the two glass substrates. In the method for manufacturing a liquid crystal display element, a technical means is adopted in which a conductive member is formed on the outer periphery of the glass substrate before the rubbing treatment.

〔Example〕

The present invention will be explained in detail below with reference to embodiments shown in the drawings.

This embodiment is characterized in that, as shown in FIGS. 1 and 2, an outer conductive film 30 is formed on the outer periphery of the glass substrate 4 before performing the rubbing process.

Specifically, when the transparent conductive film 3 is deposited on the photoglass substrate 4, it is preferable to form it simultaneously.

That is, if the pattern of the transparent conductive film 3 and the pattern of the outer conductive film 30 are respectively formed on a photomask, the outer conductive film 30 can be vapor-deposited at the same time as the transparent conductive film 3 is vapor-deposited. Therefore, it is extremely practical without any disadvantages compared to conventional manufacturing processes.

In Figure 1, the same symbols as in Figures 5 and 6 are
Since the same components are shown, their description will be omitted.

After the outer conductive film 30 is deposited, the polymer alignment film 2 is applied and rubbed, as in the conventional method, and then the glass substrate 4 is removed from the machine bed.

At this time, a discharge occurs between the glass substrate 4 and the machine bed, but since the outer periphery conductive film 30 is provided on the outer periphery of the glass substrate 4, the discharge occurs only in the outer periphery conductive film 30 closest to the machine bed 6. It is possible to reliably prevent discharge from occurring in the portion of the transparent conductive film 3, and prevent the polymer alignment film 2 in the display portion from being damaged by the discharge.

Next, after the rubbing process is completed and dust and the like are removed, as shown in FIG. 3, a peripheral sealant 7 made of epoxy resin or the like is formed on the glass substrate 4 by screen printing. Also in this case, since the outer periphery conductive film 30 is provided on the outer periphery of the glass substrate 4, when the screen-printed glass substrate 4 is removed from the screen printer bed, static electricity passes through the outer periphery conductive lI*30 of the glass substrate 4. ,
Since it flows into the support bed 11 of the screen printing machine, damage to the polymer alignment film 2 is reliably prevented.

Next, in the same manner as above, the transparent electrode 3 and the polymer alignment film 2 are
A glass substrate 4 on which is formed is prepared, and as shown in FIG. 4, these two glass substrates 4 are stacked facing each other with an outer circumferential sealing material 7 interposed therebetween, and bonded by pressure and heat treatment. Thereafter, the space surrounded by both glass substrates 4 is filled with phenylcyclohexane liquid crystal and sealed.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to reliably prevent the occurrence of creeping discharge in the transparent conductive film portion, so it is possible to reliably prevent poor alignment of liquid crystals due to destruction of the alignment film, thereby improving product quality. can be used to improve reliability.

[Brief explanation of drawings]

1, 3, and 4 are cross-sectional views of each manufacturing process of a liquid crystal display element according to the present invention, and FIG. 2 is a view taken in the direction of arrow B in FIG.
The figure is a cross-sectional view of a liquid crystal display element manufactured by a conventional manufacturing method.
The figure is a plan view taken in the direction of arrow A in FIG. 4. 1... Rubbing cloth, 2... Polymer alignment film, 3...
Transparent current-carrying film, 4... Glass substrate, 6... Machine bed, 7... Peripheral sealing material, 9... Liquid crystal, 30...
Peripheral conductive film.

Claims (2)

[Claims] (1) A liquid crystal display formed by providing a transparent conductive film and an alignment film on two glass substrates, rubbing the alignment film, and then injecting liquid crystal into the space surrounded by the two glass substrates. A method for manufacturing a liquid crystal display device, characterized in that, before the rubbing treatment, a conductive member is formed on the outer periphery of the glass substrate. (2) Manufacturing the liquid crystal display element according to claim 1, wherein the conductive member is a conductive film that is formed simultaneously when the transparent conductive film is formed on one of the glass substrates. Method.