JPS62210422A - Liquid crystal device - Google Patents

Abstract

PURPOSE:To obtain the titled device capable of preventing a short-circuit due to a projecting part existing on a substrate, and having a low cost and a good production yield by inserting an org. film between the substrate and an electrode. CONSTITUTION:The org. resin is coated on the substrate 1, 1' made of blue plate glass, which does not effect at all a treatment such as a surface polishing, by means of a spined coating, followed by curing the org. coating film 6, 6'. SnO2 film is formed on the coating film 6, 6' by means of a sputtering method to form electrodes 2, 2'. The orientation treated layers 3, 3' are formed on the electrode 2, 2'. The liquid crystal device is prepared by sealing surroundings of the substrates with a sealing agent, followed by filling the liquid crystal in between the substrates. Thus, the short-circuit which sometimes generates in a prior liquid crystal device is completely prevented in the titled device.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a liquid crystal device that can be applied to a display device such as a microcomputer, word processor, or television, or a recording device such as a disk memory.

BACKGROUND OF THE INVENTION In recent years, liquid crystal devices have been used in many fields, taking advantage of their low power consumption and thinness. Among them, liquid crystal display devices have come to be widely used instead of CRT, EL, etc.

A conventional liquid crystal device will be described below with reference to the drawings.

On the inner surfaces of a pair of opposing glass substrates (1), (1') are transparent conductive films (2), (2') made of ITO and alignment films (3), (3') made of oxide film or organic polymer film. )
The glass substrates (1) and (1') are laminated, and a liquid crystal 4 is filled between the glass substrates (1) and (1'), and the periphery thereof is sealed with a sealant (not shown). A polarizing plate 5.5' is provided on the outer surface of the lens.

In a liquid crystal device having such a configuration, the base +1 (1
), (1") surface shape (convex) or scratches, etc., the following electrodes (2), (2') may partially contact and short-circuit. In other words, the substrate (1), (1') Since the distance between the substrates (1) and (1') is approximately 1 to 20 μm, the distance between the substrates (1 μm to 20 μm) may vary depending on the surface shape or scratches of the substrates (1) and (1').
The convex portions having a height of more than m) are the substrates (1) and (1').
If the electrodes (2),
(2') came into contact with each other, causing a short circuit and failing to function as a liquid crystal device.

Furthermore, even if the convex portion has a height that is less than the substrate spacing, the I
When forming the transparent electrodes (2), (2') such as TO, the convex portion becomes a nucleus and the transparent electrode grows abnormally, resulting in a short circuit as in the case described above.

OBJECTS OF THE INVENTION An object of the present invention is to provide a liquid crystal device that prevents short circuits due to convex portions on a substrate, is inexpensive, and has a high manufacturing yield.

Structure of the Invention In order to achieve the above object, the present invention has an organic coating on a substrate that can completely cover the convex portions caused by the surface shape of the substrate or scratches or the like, or can reduce the extent of the convex portions. ,
The structure has an electrode on the organic film. This configuration realizes a liquid crystal device.

E, Example 1゜ Hereinafter, the present invention will be explained in detail using the drawings.

FIG. 2 is a diagram schematically showing an enlarged cross section of the liquid crystal device of the present invention. In the figure, materials such as glass plastic that are generally used as substrates (1) and (1') of liquid crystal devices have irregularities of at least about 1 μm, such as convex portions (7). For this purpose, surface treatments such as polishing the substrate surface are performed.

In this example, the substrates (1) and (1') are 1.1
A blue plate glass with a thickness of mm was used. The substrate was not subjected to any treatment such as surface polishing. On the substrates (1) and (1'), an organic resin (for example, transparent polyimide) is applied to a thickness of 10 μm using a spin cord and cured at a temperature of 200 to 300°C to form organic coatings (6) and (6'). And so.

Approximately -2% SnOx was applied onto the film by sputtering.
Electrodes (2), (2') are formed on the substrate, and alignment layers (3), (3') are provided on their upper surfaces. Using these substrates, the periphery is sealed with adhesive (not shown). ) and filled with liquid crystal to make a liquid crystal device.

In the case of this example, the distance between the substrates is approximately 5 μm, and the electrode (2) is further divided into 10 pieces, and the electrode (2') is similarly divided into 10 pieces, so that the electrodes 2) and (2') intersect. The substrates were stacked one on top of the other to form 100 segments. This one
10 samples with 00 segments or 1
There were no shorts in 00 x 10-1000 segments. On the other hand, in a conventional liquid crystal device having 100 segments, 12 short circuits existed in 10 segments, that is, 1000 segments.

Example 2 This example is the same as Example 1 except that there are two layers of organic coating.

When forming an organic film on the substrates (1) and (1'),
Adhesion 1 using vacuum laminating equipment! Organic films (6) and (6') each having a film-like organic resin layer (such as polyether ether ketone) and a film-like organic resin layer (such as polyether ether ketone) were formed.

At this time, the thickness of the organic coatings (6) and (6') is at least 50μ.
m, the convex portions (7) of the substrates (1) and (1') were completely covered, and the substrate surface was flat.

Effects By employing the configuration of the present invention, in a conventional liquid crystal device,
I was able to completely eliminate the occasional short circuit. Furthermore, since abnormal growth of the transparent conductive film can be prevented, one of the causes of misalignment of liquid crystals can be removed.

Note that it goes without saying that the present invention is not limited only to the examples.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a schematic cross-sectional view of a conventional liquid crystal device. FIG. 2 shows a partially enlarged sectional view of the liquid crystal device of the present invention.

Claims (1)

[Claims] 1. In a liquid crystal device that has a pair of opposing electrodes between a pair of substrates, and liquid crystal is filled between the electrodes, an organic film is provided between the substrates and the electrodes. A liquid crystal device characterized by: 2. A liquid crystal device according to claim 1, wherein the organic resin coating has a thickness of 10 μm or less.