Radiation imagery chemistry: process – composition – or product th – Radiation modifying product or process of making – Screen other than for cathode-ray tube
Patent
1993-09-22
1994-12-13
Bowers, Jr., Charles L.
Radiation imagery chemistry: process, composition, or product th
Radiation modifying product or process of making
Screen other than for cathode-ray tube
430 20, 430293, 430321, 2041811, 2041816, 2041817, 359900, G03F 900, C25D 1300
Patent
active
053729021
ABSTRACT:
A method for producing a color filter involves (A) forming a photosensitive coating film on a transparent electrically conductive layer of a transparent substrate having the transparent electrically conductive layer on its surface, and exposing the photosensitive coating film to light in a first irradiation amount through a mask having a predetermined pattern of a certain light transmittance and at least once displacing the mask to another position on the photosensitive coating film and exposing the photosensitive coating film to light in a second irradiation amount different from the first irradiation amount through the mask; and (B) developing and removing a photosensitive coating film portion exposed to light in one of the smallest and largest irradiation amounts for exposing the transparent electrically conductive layer and electrodepositing a colored coating on the exposed electrically conductive layer for forming a colored layer thereon, operation of developing and removing the photosensitive coating film and electrodepositing the colored coating being sequentially repeated for the respective irradiation amounts where the sequence of repetition is selected from increasing irradiation amount and decreasing irradiation amount to form different colored layers, respectively.
REFERENCES:
patent: 4271246 (1981-06-01), Sato et al.
patent: 4902592 (1990-02-01), Matsumura et al.
patent: 5186801 (1993-02-01), Matsumura et al.
patent: 5214541 (1993-05-01), Yamashita et al.
patent: 5214542 (1993-05-01), Yamashita et al.
Nakamura Toru
Otsuki Yutaka
Sato Haruyoshi
Yamashita Yukio
Yuasa Hitoshi
Bowers Jr. Charles L.
Chu John S.
Nippon Oil Co. Ltd.
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