JPS5817415A - Liquid crystal display element - Google Patents

Abstract

PURPOSE:To obtain an electrode substrate having high adhesive strength to a plastic substrate by sticking an electrically conductive transparent film with a semicured adhesive as a base and curing the adhesive. CONSTITUTION:Epoxy resin which is solid at ordinary temp. and an imidazole curing agent are dissolved in a ''Cellosolve '' solvent such as butyl cellosolve to prepare an adhesive 3. The adhesive is applied to a triacetate film 2 to form a layer, and it is allowed to stand to evaporate the solvent and to semicure the adhesive. A mixture of In2O3 with Sn2O is then vapor-deposited on the film with the applied adhesive to form an electrically conductive transparent film 1, and the adhesive is cured for several hr. A film of acrylic resin, polyester, epoxy resin, polypropylene, polycarbonate, polyethylene terephthalate or cellulose may be used in place of the triacetate film as the substrate to which the adhesive is applied.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid crystal display element using a plastic substrate as an electrode, and more particularly to a liquid crystal display element in which the electrode has excellent adhesion to the substrate.

The conventional method is to deposit an indium oxide film directly onto a plastic substrate. The details of the commercially available materials are unknown, but the above-mentioned errors are true.
All are in direct INK format.

Nesa films for forming electrodes are formed by vapor deposition, sputtering, etc., but when formed on plastic substrates, it is impossible to form them at high temperatures because they are made of wax or organic materials.
The adhesion between the substrate and the transparent electrode becomes weak. An object of the present invention is to solve the above-mentioned problems and to provide a liquid crystal display element by forming a transparent conductive film on a plastic film with high adhesion.

When a transparent electrode is formed on a plastic substrate as described above, the temperature cannot be raised, so the adhesion is weak and etching is difficult. Then, an adhesive layer is formed on the plastic substrate, and electrodes of a transparent conductive film are formed by vapor deposition or sputtering in a semi-cured state that is not completely cured. Thereafter, curing is performed according to a curing seal suitable for the adhesive layer.

As described above, by interposing the adhesive layer between the plastic film base and the transparent conductive film electrode, a substrate with high adhesion can be obtained.

Example 1 An epoxy resin that is solid at room temperature is mixed with a hardening agent of Ikendazole type to make #! #1 is dissolved in the agent to form an adhesive. Then, a layer of 100% adhesive was applied to the tria-7tate film to form a layer.
Leave at ℃ for 2 hours. At the same time as drying the solvent, the K11 adhesive is brought to a semi-hardened O state. After that, IfiffiO8, SilO
A transparent conductive film was formed by depositing the mixture on the film coated with the adhesive.

Further, a triacetate film was used as the substrate to which the adhesive was applied, which was then cured at 150°C for 2 to 6 hours.
Films using polyester, polyester, polytetrapyrene, polycarbonate, polyethylene terephthalate, and heptalulose will have the same effect.

After manufacturing nine electrode groups by the above method, forming a K electrode pattern and processing an alignment film, a sealing material made of the same epoxy resin as the adhesive was applied to the periphery of the substrate by screen printing. The reliability of the package is improved because the underlayer and sealant, which are heat-cured by applying a load to the upper and lower substrates, are of the same type.

Example 2 A cellulose-based or acrylic-based film was used as a support, and a nine-mera resin was dissolved in a #l agent on a polarizing plate. -Apply well. After drying the solvent at 100°C for 60 minutes,
A transparent conductive film containing Ingot as a main component is deposited. Then heat it at 150C for 60 minutes and cast it. In the case of the polarizing plate O having a support on one side using the above method, it is preferable to apply the NESA base agent to the PV film surface which is the polarizing film.

Note that FIG. 1 is a perspective view of a conventional substrate, and FIG. 2 is a perspective view of a substrate used in the liquid crystal display element of the present invention. 1 is a transparent conductive film, 2 is a plastic film, and 3 is an adhesive layer.

Note that the adhesive layer can be formed from #1 epoxy resin, melaon, or phthalkyd resin.

As explained above in the examples, the present invention can obtain an electrode substrate with high adhesion to a plastic substrate by applying a semi-cured transparent conductive film to an adhesive as a base and further curing it. . By using the plastic electrode substrate as described above, there is no problem of breakage due to overetching when forming an electrode pattern, and furthermore, resist foil 1! It is also possible to prevent the problem of the electrode film peeling off from the substrate. It is also possible to prevent peeling between the electrode and the substrate, which would otherwise occur due to deflection of the substrate due to mechanical force applied to the substrate.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a conventional substrate, and 2nd WA is a perspective view of a substrate of a liquid crystal display element according to the present invention. 1...Transparent conductive film, 2...Plastic film, 3...-1 adhesive layer. Figure 1 `` Figure 2

Claims (1)

[Claims] 1. In a liquid crystal display device in which a transparent conductive film is formed on a plastic film as an electrode substrate, an adhesive layer is formed on the plastic film in order to increase the adhesion between the transparent conductive film and the plastic film. A liquid crystal display element, characterized in that the transparent conductive film is formed and then cured in a state where the adhesive layer is completely cured. 2 Plastic films are acrylic, polyester,
2. The liquid crystal display element according to claim 1, wherein the liquid crystal display element is made of a cellulose-based film made of polypropylene, polypropylene, polycarbonate, polyethylene terephthalate. 1. The liquid crystal display element according to claim 1, wherein the adhesive layer II is made of an epoxy resin, and i is made of a melaon or tutalkid resin.