JPH03246519A - Surface colored body - Google Patents

Abstract

PURPOSE:To obtain the surface colored body formed with light shielding films having a light shielding rate sufficiently high for obtaining images of a high contrast by providing an electrical insulating film which covers light shielding film patterns and the exposed parts on one main surface of a transparent substrate and electrode groups which are provided on this film and consist of plural transparent electrode patterns. CONSTITUTION:This colored body has the transparent substrate 2, the light shielding film patterns 3 which are provided on one main surface of this transparent substrate 2 and consist of a metal or metal-contg. inorg. material and the electrical insulating film 4 which covers the light shielding film patterns 3 and the exposed parts of the one main surface of the transparent substrate 2. The colored body has the electrode groups 5 consisting of the plural transparent electrode patterns 3 provided on the electrical insulating layers 4 and colored high-polymer electrodeposition layers 6R, 6B, 6B which are formed by using the transparent electrode patterns 3 constituting the electrode groups 5 as base materials and are provided on the transparent electrode patterns 3 to constitute the base materials. The surface colored body formed with the light shielding films having the light shielding rate sufficiently high to obtain the images of the high contrast is obtd. in this way.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a colored surface material, and particularly to a colored surface material suitable as a filter for full-color liquid crystal displays.

[Prior Art] A colored surface material used as a filter to make a full-color liquid crystal display has red, green, and blue colored layers arranged in a predetermined pattern on a transparent substrate to form pixels, and removes unnecessary light. Devices in which a light shielding film is provided between pixels are widely used for the purpose of shielding light and improving image contrast.

Pixels in such surface-colored bodies are designed to increase the number of pixels, increase the aperture ratio, and miniaturize the pixels associated with these.
In order to avoid deterioration of precision in the shape and dimensions of pixels, they are generally formed by a polymer electrodeposition method.

At this time, a plurality of transparent electrode patterns corresponding to the arrangement pattern of the pixels are provided on the surface of the transparent substrate on which the pixels are provided.

Further, the light shielding film is disposed on one main surface of the transparent substrate adjacent to the transparent electrode pattern. As the material for the light shielding film, for the purpose of preventing electrical conduction with the transparent electrode pattern when forming pixels by polymer electrodeposition method, etc.
A nonconducting organic resin containing carbon particles, pigments, etc. is used, and its light shielding rate is about 96% at maximum.

[Problems to be solved by invention E] In recent years, there has been a desire to improve the quality of images on liquid crystal color displays, and even for surface colored bodies used as filters for full color display, there is an increase in the number of pixels and an aperture ratio. There is a desire for an increase in the number of pixels, miniaturization of pixels, and an improvement in the light shielding rate to improve contrast. Among these, the increase in the number of pixels and the aperture ratio of the surface colored body, and the accompanying miniaturization of the pixels, can be achieved by forming the pixels using polymer electrodeposition, as described above. This can be achieved without reducing precision in shape or size.

However, in the case of surface-colored bodies with a conventional structure that uses nonconducting organic resin as the material for the light-shielding film, the light-shielding film can be prevented from electrical conduction with the transparent electrode pattern for forming pixels by polymer electrodeposition. Since it is very difficult to improve the light shielding rate, there is a problem in that the light shielding rate cannot be improved to a level where a high contrast image can be obtained. Further, even if a metal film with a high light-shielding rate is used as the light-shielding film, due to its conductivity, it is disadvantageous in that it is selectively colored in the polymer electrodeposition method.

Therefore, an object of the present invention is to provide a surface-colored body having pixels formed by polymer electrodeposition and a light-shielding film (light-shielding film pattern) having an extremely high light-shielding rate sufficient to obtain a high-contrast image. Our goal is to provide the following.

[Means for Solving the Problems] The present invention has been made to solve the above object, and the surface colored body of the present invention comprises a transparent substrate and one main surface of the transparent substrate. , a light-shielding film pattern made of a metal or a metal-containing inorganic substance, an electrically insulating film that covers the light-shielding film pattern and the exposed portion of the one main surface of the transparent substrate, and a plurality of transparent films provided on the electrically insulating film. It has an electrode group consisting of an electrode pattern, the transparent electrode pattern constituting the electrode group as a base material, and a colored polymer electrodeposition layer provided on the transparent electrode pattern serving as the base material. It is characterized by:

[Examples] Examples of the present invention will be described below with reference to the drawings.

Embodiment FIG.
FIG. 2 is a cross-sectional perspective view schematically showing an example of the case where the present invention is applied to a surface colored body arranged in a triangular shape with a pitch of 0 μm and 70 μm.

This surface colored body 1 has a thickness of 1. A 1 mm thick aluminoborosilicate glass is used as the transparent substrate 2, and on one main surface of the transparent substrate 2, a film with a thickness of approximately A light shielding film pattern 3 made of 1200 chrome films is provided.

The light shielding film pattern 3 made of this chromium film and the transparent substrate 2
The exposed portion of the main surface on the side where the light-shielding film pattern 3 is provided is covered with an electrically insulating film 4 made of an Si 02 film with a thickness of 3000 nm formed by sputtering.

On the electrical insulating film 4, there is a transparent electrode pattern 5R made of an ITO film with a thickness of about 1700 nm formed by sputtering.
, 5G and 5B are provided to form an electrode group 5. Each transparent electrode pattern 5R, 5G and 5B is
It has a pixel pattern p and a lead pattern l depending on the arrangement shape of pixels.

Then, on each transparent electrode pattern 5R15G and 5B, a polymer electrodeposition layer 6 is formed by a polymer electrodeposition method using these transparent electrode patterns 5R15G and 5B as base materials (electrodes).
R, 6G and 6B are provided. Polymer electrodeposition layer 6
R16G and 6B exhibit substantially any one color among 0, red, green, and blue, and in the surface colored body 1 of this example, the polymer electrodeposition layer 6R exhibits red color, and the polymer electrodeposition layer 6R exhibits red color. The layer 6G exhibits a green color, and the polymer electrodeposition layer 6B exhibits a blue color. The polymer electrodeposition layers 6R16G and 6B are formed so that adjacent polymer electrodeposition layers do not have the same color. Among these polymer electrodeposition layers 6R16G and 6B, transparent electrode patterns 5R15G and 5B
A portion provided on each pixel pattern p corresponds to a pixel.

In the surface colored body 1 formed in this way, the light shielding film pattern 3 made of a chromium film has a visible light range (wavelength 380 to 380).
Since the light shielding rate at 780 nm is extremely high at 99.7%, when used as a filter to make a full-color liquid crystal display, a full-color image with high contrast can be obtained.

Note that the surface-colored body of the present invention is not limited to the embodiments described above, but includes the following modified examples and application examples.

First, although aluminoborosilicate glass was used as the transparent substrate in the above embodiment, the material of the transparent substrate used for the surface colored body of the present invention is not particularly limited, and transparent glass such as soda lime glass or quartz glass may be used. Translucent alumina sintered bodies, transparent ceramics such as Sialon and PLZT, transparent resins such as acrylic resins and vinyl chloride, etc. can be used, and can be selected as appropriate depending on the purpose.

The material of the light-shielding film pattern is not particularly limited as long as it is a metal or metal-containing inorganic material that has a light-shielding rate of 99.7% or more in the visible light region, and in addition to chromium used in the examples, tantalum, Elemental metals such as tungsten and molybdenum, metal oxides such as chromium oxide and molybdenum oxide, metal silicides such as tantalum silicide, tungsten silicide, and molybdenum silicide can be used. The structure of the light shielding film does not have to be a single-layer structure, but may be a multi-layer structure such as a two-layer structure.

The material of the electrical insulating film is not particularly limited as long as it can electrically insulate between the light shielding film pattern and the transparent electrode pattern and is transparent, and in addition to 5i02 used in the example, Silicon-containing resin, acrylic resin, etc. can be used.

The material for the transparent electrode pattern may be 5nC)2 doped with antimony, In2O3, or the like, in addition to ITO used in the examples.

The material of the polymer electrodeposition layer is not particularly limited as long as it can function as a pixel of the surface colored body, and materials of the polymer electrodeposition layer that have been conventionally used as pixels of the surface colored body can be used. Can be used. The material for such a polymer electrodeposition layer is, for example, a resin material such as a maleated oil type, an acrylic type, a polyester type, a polybutadiene type, or a polyolefin type. In order to obtain a molecular electrodeposition layer, a red pigment containing red pigment, an azo-based red pigment, a quinacridone-based red pigment, a perylene-based red pigment, etc. is used; in order to obtain a green-colored polymer electrodeposition layer, a phthalocyanine-based green pigment, etc. is used. containing
In the case of obtaining a polymer electrodeposition layer exhibiting a blue color, a layer containing a phthalocyanine blue pigment or the like may be used.

The surface colored body of the present invention can be manufactured, for example, as follows.

First, a film of 1000 to 3500 thick made of metal or a metal-containing inorganic substance is formed on one main surface of a transparent substrate by sputtering, vacuum evaporation, or the like. Next, a resist film with a thickness of 0.5 to 3 μm was provided on this film by a spin code method or the like, and after prebaking at 100°C for 30 minutes,
Exposure is performed using a photomask having a desired pattern, and further development, etching, and resist peeling are performed to obtain a desired pattern of a light-shielding film made of metal or metal-containing inorganic material. By using such photolithography technology, it is possible to obtain a light-shielding film pattern with high positional accuracy, and it is also possible to increase the resolution of images on a liquid crystal display.

Next, an electrically insulating film that covers this light-shielding film pattern and the exposed portion of the main surface of the transparent substrate on which the light-shielding film pattern is provided is deposited using a physical method such as sputtering, vacuum evaporation, or ion blating. It is formed by a chemical film forming method such as a chemical film forming method or a chemical vapor deposition method (CVD). The film forming method used at this time can be appropriately selected depending on the substance used as the material of the electrical insulating film, the intended thickness of the electrical insulating film, voltage resistance, and the like.

Next, a transparent electrode pattern is formed on the electrical insulating film.

The formation of this transparent electrode pattern is as follows except for the photomask pattern and film material (pattern material) used.
This can be done in the same way as the light shielding film pattern. Note that the shape of the transparent electrode pattern is changed as appropriate depending on the arrangement pattern of pixels in the target surface colored body.

Thereafter, a polymer electrodeposition layer is provided on the transparent electrode pattern by a polymer electrodeposition method using the transparent electrode pattern as an electrode. At this time, the electrodeposition can be carried out in the same manner as a normal polymer electrodeposition method, except that electrodeposition is carried out a desired number of times while taking care that adjacent polymer electrodeposition layers do not have the same color.

[Effects of the Invention] As explained above, the surface colored body of the present invention has pixels formed by a polymer electrodeposition method, and has a light shielding rate that is sufficiently high to obtain a high contrast image. Equipped with a membrane.

Therefore, by implementing the present invention, it is possible to reproduce a high-contrast full-color image on a liquid crystal display, and it is possible to improve the quality of the liquid crystal color display.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional perspective view schematically showing an example of the surface colored body of the present invention. 1...Surface colored body, 2...Transparent substrate, 3...
Light shielding film pattern, 4... Electrical insulation film, 5R15G
, 5B... Transparent electrode pattern, 5... Electrode group,
6R. 6G, 6B...Polymer electrodeposition layer.

Claims (1)

[Claims] (1) a transparent substrate; a light-shielding film pattern made of a metal or a metal-containing inorganic substance provided on one main surface of the transparent substrate; and a light-shielding film pattern and an exposed portion of the one main surface of the transparent substrate. an electrically insulating film to cover, an electrode group consisting of a plurality of transparent electrode patterns provided on the electrically insulating film, and the transparent electrode pattern forming the electrode group as a base material, and the transparent electrode serving as the base material. placed on the pattern,
1. A surface-colored body comprising a colored polymer electrodeposition layer.