JPS6366503A - Production of color filter for liquid crystal display body - Google Patents

Abstract

PURPOSE:To improve the accuracy of picture element patterns by forming patterns of color materials on a transparent substrate by a printing method, laminating a film resist thereon, developing the resist and removing the resist and color materials of unnecessary parts. CONSTITUTION:The patterns of the color materials 2 larger than the area of the necessary picture elements are printed by each color on the transparent substrate 1. The sheet-like resist film 3 is then laminated over the entire surface while the cover film 3c thereof is stripped. The resist film is then exposed by using a photomask 4 formed with the picture element patterns and the resist 3 and the color materials 2 of the unnecessary part are removed together with the film 3a by stripping the base film 3a of the film 3. The parts from which the resist 3 and the color materials 2 are removed are further subjected to printing of black and are thereby provided with a black matrix. The color filter having the high-accuracy picture element patterns is thereby easily obtd.

Description

[Detailed description of the invention] Industrial applications The present invention consists of seven liquids used in color liquid crystal display devices. This invention relates to a method of manufacturing a black coat L0 color filter.

Traditional technology The traditional method of manufacturing color filters is gelatin.

Generally, a pixel pattern is created by imparting photosensitivity to a denatured protein such as casein or a synthetic dyeable resin, and then dyed, or a resist is applied to the previously applied dyeable resin and each pixel is dyed. It is true.

Additionally, methods of forming pixels by printing have also been attempted.

Problems to be Solved by the Invention In the method using dyeing, the steps of forming a relief of the photosensitive resin and dyeing must be repeated for each color to be dyed, which makes the steps complicated and increases the cost.

On the other hand, in the printing method, the pixel size is 411k, and there are major problems such as difficulty in controlling the film thickness, poor surface smoothness, and difficulty in maintaining a constant thickness of the liquid crystal layer.

Means for solving the problem: After forming a pattern of coloring material with an area larger than the required pixel size on a transparent substrate by a printing method, a sheet-like film resist is laminated on the pixel,
The photosensitive resin and coloring material corresponding to unnecessary pixel areas are removed by development.

According to the present invention, unnecessary portions of pixels formed by the printing method are removed together when the photosensitive resin applied later is removed by development, and only the pixel pattern of the necessary portions is removed. is formed with high precision. Moreover, the surface irregularities caused by the printing method are covered by the photosensitive resin applied thereon, and the surface smoothness is improved.

Example As shown in FIG. 1, a pattern of coloring material 2 larger than the required pixel area is formed on a transparent substrate 1 for each color (R, G, B).
to print. The peripheral parts of the pixels overlap each other with color materials 2 of different colors. With the printing method, it is difficult to control the film thickness, the thickness of each pixel varies widely, and the surface is uneven.

Next, as shown in (), a photosensitive layer (resist) 3b containing an acrylic monomer is applied to the entire surface on which the pixels are printed.
While peeling off the cover film, the sheet-like resist film 3 of the German/Deutsch structure is sandwiched between two film sheets, the base film 3a and the cover film 3c.
Laminate at 0°C. Thereafter, as shown at 0, exposure is performed using a photomask 4 on which a necessary pixel pattern has been formed in advance. When the photosensitive layer in the exposed area is photopolymerized, the adhesive strength with the base film decreases. As shown in No. 0, when the base film is peeled off, both the photosensitive layer in the exposed area and the two portions of the printed color material immediately below it are removed. Therefore, the color filter 2a made up of pixels according to the pattern of the photomask 4 remains on the transparent substrate 1, resulting in a highly accurate pixel color filter.

In addition, the large unevenness of the surface of the pixel formed by printing is covered with a photosensitive resin, which improves the surface smoothness and eliminates problems such as disconnection of the common electrode provided thereon.

FIG. 2 shows a schematic cross-sectional view of a liquid crystal panel of a color liquid crystal device using the color filter of the present invention.

6 is a liquid crystal and transparent substrate 1j? and 1'. On the upper transparent substrate 1, a color filter 2a and a common type M6 formed of a transparent electrode film are laminated in order.

A thin film field effect transistor C is mounted on the lower transparent substrate 1'.
A pixel electrode 7 formed of a transparent conductive film (hereinafter abbreviated as FET) and a transparent conductive film driven by this FET is supported.

Polarizing plates 8 and 8' are arranged so that the polarization axes of S are parallel to each other. The alignment of molecules of liquid crystal 6 is controlled by alignment films 9 and 9'.

With the liquid crystal panel configured as described above, when white light is irradiated from below and at the same time the TPT is driven according to the pixel signal and the voltage applied to the liquid crystal layer is changed, the amount of light passing through the liquid crystal layer changes accordingly. and a color image is reproduced.

Furthermore, by printing black between each pixel, a highly accurate black matrix can be obtained, and a color filter with good contrast can be produced.

Example 1 An original plate was made using a waterless plate made by Toshi ■, and a flat plate offset stamp was made! ! 8) - Use blue ink to print the required pixel pattern and pixels with a large area.

A film resist was laminated and exposed to ultraviolet light through a photomask as shown in FIG. By performing peeling development, the portions that were not exposed to light were peeled off from the glass surface along with the printed portions. As a result, it was not possible to create a color filter with pixels in the same pattern as the photomask pattern.

Example 2 A black coloring material was printed between pixels on a color filter completed in the same manner as in Example 1 to form a plaque matrix, and a color filter with good contrast was completed.

Effects of the Invention According to the present invention, a liquid crystal with a highly accurate pixel pattern can be easily produced by a manufacturing method that includes a step of printing pixels, then laminating a film resist on the upper surface and removing each unchanged part. You can create color filters for display.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing the process of manufacturing a color filter for a liquid crystal display according to the present invention, and FIG. 2 is a schematic cross-sectional view of a liquid crystal panel of a color liquid crystal display device using the color filter of the present invention. 1...Transparent substrate, 2...Coloring material, 2a.
...Color filter, 3b...Photosensitive layer,
4...Photomask. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure I A Naw i 11ξ 1tttt7ttt White tip

Claims (2)

[Claims] (1) After forming a pattern of coloring material having an area larger than the required pixels on a transparent substrate by a printing method, laminating a sheet-like film resist on the coloring material,
A method for manufacturing a color filter for a liquid crystal display, characterized in that the film resist and coloring material for unnecessary portions of pixel portions are removed by peeling and development. (2) The method for manufacturing a color filter for a liquid crystal display according to claim 1, characterized in that a black matrix is provided by printing black on the pixel portions removed by development.