JPH03246518A - 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 coating the exposed parts on one main surface of light shielding film patterns and a transparent substrate and providing electrical insulating layers of a singly layer structure or plural layer structure having a substantially flat surface. 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 layers 4 of the single layer structure or the plural layer structure which covers the light shielding film patterns 3 and the exposed parts of the one main surface of the transparent substrate 2 and have the substantially flat main surface. The colored body has electrode groups 5 consisting of the plural transparent electrode patterns 3 provided on the substantially flat main surface of 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 elec trode 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 general, the pixel may be formed by a polymer electrodeposition method in order to avoid deterioration of precision in the shape and dimensions of the pixel.

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 the Invention] In recent years, there has been a desire to improve the quality of images on liquid crystal color displays, and the number of pixels and the aperture ratio have increased even in surface colored bodies used as filters for full color display. 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, its conductivity causes problems 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, and a single-layer structure or multilayer structure that covers the light-shielding film pattern and the exposed portion of the one main surface of the transparent substrate, and has a substantially flat main surface. an electrically insulating layer of a structure, an electrode group consisting of a plurality of transparent electrode patterns provided on the substantially flat main surface of this electrically insulating layer, and the transparent electrode pattern constituting this electrode group as a base material. , a colored polymer electrodeposited layer provided on the transparent electrode pattern serving as the base material.

[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 uses aluminoborosilicate glass with a thickness of about 1.1 mm as a transparent substrate 2, and on one main surface of this transparent substrate 2, except for a portion corresponding to the pixel arrangement position, The thickness of the film formed by sputtering was approximately 12 mm.
A light-shielding film pattern 3 made of a chromium film of 0.00000000000 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 a 5i02 film 4a having a thickness of 4000 mm formed by a sol-gel method. 5i02 membrane 4a
The main surface on the side away from the transparent substrate 2 is substantially flat, and on this flat main surface, a 5i02 film 4b with a thickness of 3000 nm is provided, which is formed by sputtering.
This 5i02 film 4b and the above-mentioned 5i02 film 4a form an electrically insulating layer 4 having a two-layer structure. Note that the main surface of the electrically insulating layer 4 on the side away from the transparent substrate 2 is also substantially flat.

On the electrical insulating layer 4, a transparent electrode pattern 5R made of an ITO film with a thickness of 1700 mm is formed by sputtering.
, 5G and 5B are provided to form an electrode group 5. Each transparent electrode pattern 5R15G 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 5R, 5G, and 5B, polymer electrodeposition layers 6R, 16G, and 6B are provided by a polymer electrodeposition method using these transparent electrode patterns 5R, 5G, and 5B as base materials (electrodes). It is being The polymeric electrodeposited layers 6R16G and 6B each exhibit substantially any one of red, green, and blue, and in the surface colored body 1 of this example, the polymeric electrodeposited layer 6R exhibits red, The polymer electrodeposition layer 6G exhibits a green color, and the polymer electrodeposition layer 6B exhibits a blue color. The polymer electrodeposition layers 6R, 6G, and 6B are formed so that adjacent polymer electrodeposition layers do not have the same color. Among these polymer electrodeposition layers 6R, 6G and 6B, transparent electrode patterns 5R, 5G 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. Also, transparent 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 appropriately selected depending on the application.

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 electrically insulating layer 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. , silicon-containing resin, acrylic resin, etc. can be used. The structure of the electrical insulating layer may be a single layer structure as long as it has a substantially flat main surface.
It may also have a multi-layer structure such as a two-layer structure. In the case of a multi-layer structure, the material of the uppermost layer, that is, the layer on which the transparent electrode pattern is provided, may be any of the above materials. In this case, the materials of the layers other than the uppermost layer may be MgF2, Tidy,
, ZrO2, or other transparent materials may also be used. At this time, by appropriately combining the materials used, layers other than the top layer can have antireflection properties.

The material for the transparent electrode pattern may be 5na2, In2O3, etc. doped with antimony, in addition to the 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 an electrodeposited layer, red pigment, azo red pigment, quinacridone red pigment, perylene red pigment, etc. are added, and in order to obtain a green polymer electrodeposition layer, a phthalocyanine green pigment, etc. is used. What it contains,
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 a metal or a metal-containing inorganic substance is formed on one main surface of a transparent substrate by a physical vapor deposition method such as a sputtering method or a vacuum evaporation method.

Next, a film with a thickness of 0.5
A resist film of ~3 μm is formed, prebaked at 100°C for 30 minutes, exposed to light using a photomask with a desired pattern, and further developed, etched, and resist peeled to remove the metal or metal-containing inorganic material. A light-shielding film pattern having a desired pattern is obtained. 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 electrical insulating layer is formed that covers this light-shielding film pattern and the exposed portion of the main surface of the transparent substrate on the side where the light-shielding film pattern is provided, and has a substantially flat main surface. When the electrical insulating layer has a single-layer structure, it is preferable to use a sol-gel method to form a substantially flat main surface.
After applying to the thickness of 00-10000, 200-40
Obtained by firing at 0°C. In addition, in the case of a multi-layer structure, it is sufficient that the uppermost layer, that is, the layer on which the transparent electrode pattern is provided, is made of an insulating material and has a substantially flat main surface; The sol-gel method and resin spin-coding method, which can form a flat main surface, and the physical film-forming methods, such as sputtering and vacuum evaporation, which are difficult to form a substantially flat main surface. Alternatively, various combinations of chemical film forming methods such as vapor phase growth (CVD) can be used.

The reason why the main surface of the electrical insulating layer is made substantially flat is that if the main surface of the electrical insulating layer has unevenness that reflects the difference in level between the light-shielding film pattern and the transparent substrate, it is difficult to provide the transparent electrode pattern described below. This is because the transparent electrode pattern may break at the uneven portion, and if broken, it cannot be used as an electrode, leading to a decrease in yield. This phenomenon is particularly likely to occur at the outer periphery of the surface-colored body.

Next, a transparent electrode pattern is formed on the electrically insulating layer.

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.

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 material having an extremely high light-shielding rate sufficient 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 insulating layer, 5R, 5G
, 5B... Transparent electrode pattern, 5... Electrode group,
6R16G, 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 layer having a single-layer structure or a multi-layer structure having a substantially flat main surface; and a plurality of transparent electrode patterns provided on the substantially flat main surface of the electrically insulating layer. an electrode group, the transparent electrode pattern constituting the electrode group being a base material, and provided on the transparent electrode pattern serving as the base material;
1. A surface-colored body comprising a colored polymer electrodeposition layer.