JPS60182417A - Color liquid crystal display device - Google Patents

Abstract

PURPOSE:To simplify the process of manufacture by dyeing a silane coupling layer and forming a color filter. CONSTITUTION:The silane coupling layer 13 for improving the adhesion of an oriented film to a substrate 11 facing a substrate provided with a semiconductor driving circuit is formed on the substrate 11. The substrate is coated with photoresist and then bored at specific positions and dipped in a dye bath so that the photocoupling layer is dyed at parts corresponding to respective picture element electrodes. This process is repeated three times to form R, G, and B and then heat fixation is carried out at 180 deg.C. The dye forming the dye bath uses an acid dye and a cation dye suitably and the bath temperature is 100 deg.C. Then, an oriented layer 9 is formed to a 100-10,000Angstrom thickness. The oriented layer is rubbed at right angles and a P type liquid crystal material is injected to constitute twist structure corresponding to the rubbing direction of the wall surface.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a color liquid crystal display device, and more particularly to an improvement in a color liquid crystal display device in which a semiconductor drive circuit is provided on at least one of the substrates constituting the entire display portion of the display device.

An example of a conventional color liquid crystal display device is shown in FIG. This shows a transmissive TN type color liquid crystal display device, and in the figure, 10 is a liquid crystal material, such as 0ZLI manufactured by Merck & Co.
1253, ZL, I 1694, ZLI24] 1, etc., 11 indicates upper and lower substrates, and 12 indicates a polarizing plate provided on the substrates.

On the substrate 11 on the semiconductor drive circuit side, there is a gate electrode 1 made of a transparent or metal thin conductive film, such as an At thin film.
A pixel electrode 2 made of a transparent electrode such as O1Sn02 is formed, and a semiconductor 3 such as an amorphous silicon semiconductor is formed on the dirt electrode 1 via an insulating film 5 made of, for example, a silicon dioxide film. Electrodes 4 including a source electrode made of, for example, At, provided in contact with one end of the semiconductor 3, and a drain electrode made of, for example, At, provided in contact with the other end of the semiconductor 3, are arranged on both sides of the semiconductor. The drain electrode is connected to the pixel electrode 2.

On the semiconductor drive circuit formed as described above, for example, polyimide, polyamide, etc.
An alignment layer 9 made of polyno, laxylylene, polyvinyl alcohol, etc. is formed.

Further, on the substrate 11 on the counter electrode side, R, G, and B color filters 6.7.8 are formed at positions corresponding to each pixel via a silane coupling layer 13 for reinforcing adhesion. An alignment layer 9 is formed on top. color filter 6
．． 7.8 is formed by a gelatin-stained membrane, a PVA-stained membrane, etc.

In order to control the alignment of the liquid crystal, the alignment layer 9 is rubbed and has a twisted structure, and a polarizing plate 12 is provided on the outside of the substrate 11, and both substrates are laminated together.
During this time, liquid crystal material 10 is injected and sealed.

In the conventional color liquid crystal display device as described above, a step of forming each layer of a silane coupling layer, a color filter layer, and an alignment layer is required in order to completely fabricate the substrate on the counter electrode side. An object of the present invention is to provide a color liquid crystal display device that can be manufactured at a lower cost through simpler steps than conventional ones.

In other words, the present invention provides a film that improves the adhesion between the substrate and the alignment film, that is, a silane/coupling layer, by dyeing the entire layer, and a separate color filter by adding the full function of a color filter layer to the silane coupling layer. It is an object of the present invention to provide a color liquid crystal display device that can be manufactured without requiring a step of forming layers.

The present invention will be explained below with reference to the drawings.

FIG. 2 shows an embodiment of the color liquid crystal display device according to the present invention, which is a transmissive type TN display device as shown in FIG.
3 shows a color liquid crystal display device to which the present invention is applied. In FIG. 2, parts similar to those shown in FIG. 1 are designated by the same reference numerals. That is, in FIG. 2, 1 is a dirt electrode made of a transparent conductive film or a thin conductive film of a metal such as At, 2 is a pixel electrode made of ITO% 5n02, etc., 3 is a semiconductor such as amorphous silicon, and 4 is a dirt electrode made of a thin conductive film of a metal such as At.
Reference numerals refer to source and drain electrodes made of At or the like, 5 an insulating film made of terraned silicon or the like, 9 an alignment layer made of polyimide, polyamide, polyparaxylylene, polyvinyl alcohol, etc., 10 a liquid crystal material, and 11 A substrate made of glass or the like, and 12 a polarizing plate.

A silane coupling layer 13 for improving the adhesion of the alignment film 9 to the substrate 11 is formed on the substrate 11 on the counter electrode side. In the present invention, by dyeing the silane coupling layer 13 with R, G, and B in predetermined pixel portions, the color filter layers 6A and 7A are dyed.
, 8A. In this way, by dyeing the 7-run power springing layer to form a color filter layer, the adhesion of the alignment film is strengthened, reliability is improved, the manufacturing process is simplified, and a color liquid crystal display device that can be manufactured at low cost is realized. provided.

An example of manufacturing the above color liquid crystal display device will be described below.

The substrate on the semiconductor drive circuit side is prepared by a well-known method, and subjected to alignment treatment by rubbing.

On the substrate on the counter electrode side, in order to improve the adhesion of the alignment film to the substrate, for example, 5H6020 ~ aminosilane γ-(2-aminoethyl]aminoglobiltrimethoxysilane ~, 5H6040 ~ epoxysilane γ manufactured by Toshi Silicone)
The silane coupling layer 13 consisting of -glycidoxypropyltrimethoxysilane- etc.
It is formed by heat curing at 120°C for 15 minutes to a film thickness of . In order to dye the coupling layer in a portion corresponding to each opposing pixel electrode, after coating with photoresist, a predetermined portion is opened and immersed in a dyeing bath for 10 minutes. This is all 3
After forming R, G, and Be repeatedly, it was heated to 180°C for 15
Heat and fix for a minute. The dye forming the dye bath is preferably an acid dye or a cationic dye, and the bath temperature is 100°C. After forming the color filter layer in this way, the alignment layer 9'1
Form with a thickness of 100 to 10,000X.

The alignment layers are rubbed in directions perpendicular to each other.
For example ZLI 1253, ZLI 1694,
A P-type liquid crystal material such as ZLI 2411 is injected to form a twisted structure according to the rubbing direction of the wall surface ◇ In this way, the linear polarizing plates 12 are placed outside the cells with their axes parallel to each other with the liquid crystal material sandwiched between them. . When an electric field is applied to each pixel configured in this manner, light passes through a predetermined filter, and colored light is observed.

As explained above, the present invention aims to strengthen the adhesion of the alignment film and forms a dyed color filter layer, so reliability is improved, the process is simplified, and it is cheaper and has better performance than conventional ones. To provide an excellent color liquid crystal display device.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a conventional color liquid crystal display device, and FIG. 2 is a sectional view showing an embodiment of the color liquid crystal display device according to the present invention. 1... Dirt electrode 2... Pixel electrode 3... Amorphous silicon semiconductor 4... Source/drain electrode 5... Insulating layer 6... Color filter (Red) 7... Color filter (Qreen) )8... Color filter (Blue)9... Alignment layer 10... Liquid crystal material 11... Substrate 12... Polarizing plate 13... Silane coupling layer Fig. 1 Fig. 2

Claims (1)

[Claims] In a liquid crystal display device in which a liquid crystal layer is sandwiched between opposing substrates and a semiconductor drive circuit is provided on at least one of the substrates, a method for strengthening the adhesion of an alignment layer formed on one substrate side. A color liquid crystal display device characterized in that a silane coupling layer is made into a color filter layer by dyeing R, G, and H at predetermined pixel portions.