Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Screen other than for cathode-ray tube
Patent
1991-05-16
1993-09-28
McCamish, Marion E.
Radiation imagery chemistry: process, composition, or product th
Radiation modifying product or process of making
Screen other than for cathode-ray tube
430 20, 430257, 430258, 430320, 430394, 359 85, B44C 104, G02F 113
Patent
active
052485765
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method of producing a color filter having a coloring matter layer prepared by a micellar disruption method, and relates to a resist for a light-shielding film used in this method for forming a black matrix.
BACKGROUND ART
Heretofore, several methods of producing a color filter used for a display for a liquid crystal TV, a personal computer and the like, have been known. Such known methods include:
(1) a dyeing method which comprises dyeing a gelatin layer formed on a substrate, forming a photo-resist layer and curing the resist with a ultraviolet ray;
(2) a dispersion method which comprises dispersing a dye in a resist material, and then curing the resist material with the ultraviolet ray;
(3) a printing method which comprises directly printing a pattern for a coloring matter film and the like on a substrate; and
(4) an electrolytic method which comprises forming a dispersion of a dye in a suitable solvent, and subjecting the dispersion to electrodepositing treatment utilizing an electrode formed on the substrate.
However, the above dyeing method (1) has a disadvantage in that the resultant filter has poor light resistance. The above dispersion method (2) shows a poor productivity due to a complexity of the steps. Further, the above printing method (3) is unsuperior in accuracy and light resistance. On the contrary, the above electrodeposition method (4) is advantageous since the resultant filter has good light resistance and high heat resistance. However, according to the method (4), the resultant filter needs a transparent electrode for forming a coloring matter layer, and needs, on its surface, an electrode for driving a liquid crystal as is the same case with the above methods (1) to (3).
On the other hand, as a process for producing a color filter which is capable of forming a conductive coloring matter layer, Japanese Patent Application Laid-Open Gazette No. 63-243298 discloses a micellar disruption method which comprises forming a transparent electrode in a desired shape on an insulating substrate, and forming a porous hydrophobic coloring matter film on the electrode by a micellar disruption method.
Recently, a light-shielding film is indispensable to make a display device such as a color filter, a liquid crystal display material, an electron display material, and a color display. These display devices have widely been used in several fields such as a lap-top personal computer, a note type personal computer, an audio equipment, an inside panel for an automotive, a clock, a calculator, a video cassette deck, a facsimile, a communication equipment, a game machine and a measurement equipment.
For example, in the fields of a color filter, a light-shielding film is used as a black matrix to be formed between each of picture elements such as red (R), green (G) and blue (B). Such black matrix is used to avoid lowering contrast and color purity due to leaked light.
Heretofore, in the case of forming each picture element (coloring matter layer) such as a color filter by a printing method, a dispersion method or a dyeing method, there have been used a carbon type photo-resist material and a chromium film in many cases.
However, the use of the carbon type photo-resist material or the chromium film cannot give an electrode for driving a liquid crystal and an electrode for forming a coloring matter film at the same time due to their conductivity. More specifically, when a black matrix is first formed, using the photo-resist material or the chromium film, on an ITO electrode on which a pattern was formed for forming a coloring matter layer, the ITO electrode will be electrically connected with a right and left side electrodes. Thus, a coloring matter layer cannot be formed by a micellar disruption method and the like. On the contrary, when a black matrix is formed after a coloring matter layer is formed, there will be a problem that a liquid crystal cannot work due to electrical connection between the ITO electrode and a right and left side electrodes during
REFERENCES:
patent: 4902592 (1990-02-01), Matsumura et al.
Eida Mitsuru
Kurata Hideaki
Yokoyama Seiichiro
Idemitsu Kosan Co. Ltd.
McCamish Marion E.
Rosasco S.
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