US 5,665,496 AGranted

Method for producing color filter

AssigneesNippon Oil Co., Ltd., Dai Nippon Printing Co., Ltd.

InventorsHiroyoshi Omika, Yutaka Otsuki, Hitoshi Yuasa, Eiji Yoda, Toru Nakamura, Masayuki Ando, Teruhisa Kuroki, Norikatsu Ono

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Abstract

A method for producing a color filter involves (a) forming a positive photosensitive coating film on a transparent electrically conductive layer of a transparent substrate; (b) forming a light-irradiated region where a light irradiation amount is different in two steps; (c) developing a larger light-irradiated portion to lay-open the transparent electrically conductive layer followed by electrodepositing a light shielding layer thereon; (d) forming on the positive photosensitive coating film undeveloped in the step (c) a light-irradiated region where a light irradiation amount is different in two steps; (e) developing a larger light-irradiated portion of the photosensitive coating film to lay-open the transparent electrically conductive layer followed by electrodepositing a colored coating thereon; (f) forming on the positive photosensitive coating film undeveloped in the step (e) a light-irradiated region where a light irradiation amount is different in at least three steps; and (g) developing the photosensitive coating film to lay-open the transparent electrically conductive layer followed by electrodepositing a colored coating thereon, operation of the developing and electrodepositing being sequentially repeated at least twice in decreasing light irradiation amounts.

Claims13

Dependent claims

A method for producing a color filter comprising the steps of:

(a) forming a positive photosensitive coating film on a transparent electrically conductive layer of a transparent substrate having said transparent electrically conductive layer thereon;
(b) forming on said positive photosensitive coating film a light-irradiated region where a light irradiation amount is different in two steps using a mask having light transmittances different in two steps;
(c) developing a light-irradiated portion of the positive photosensitive coating film irradiated with a higher light irradiation amount to lay-upon said transparent electrically conductive layer followed by electrodepositing a light shielding layer thereon;
(d) forming on the positive photosensitive coating film undeveloped in said step (c) a light-irradiated region where a light irradiation amount is different in two steps using a mask having light transmittances different in two steps;
(e) developing a light-irradiated portion of the photosensitive coating film irradiated with a higher light irradiation amount in the light-irradiated region formed in said step (d) to lay-open the transparent electrically conductive layer followed by electrodepositing a colored coating thereon to form a colored layer;
(f) forming on the positive photosensitive coating film undeveloped in said step (e) a light-irradiated region where a light irradiation amount is different in at least three steps using a mask having light transmittances different in two steps or a mask having light transmittances different in three steps;
and
(g) developing the photosensitive coating film in the light-irradiated region formed in said step (f) to lay-open the transparent electrically conductive layer followed by electrodepositing a colored coating thereon to form a colored layer, operation of said developing and electrodepositing in this step being sequentially repeated at least twice in an order of decreasing light irradiation amounts, to thereby form at least a colored layer,
wherein ultrasonic wave is irradiated to said transparent substrate having said transparent electrically conductive layer before said electrodepositing in at least one of said steps (c), (e) and (g).

6 more elements

A method for producing a color filter comprising the steps of:

(a) forming a positive photosensitive coating film on a transparent electrically conductive layer of a transparent substrate having said transparent electrically conductive layer thereon;
(b) forming on said positive photosensitive coating film a light-irradiated region where a light irradiation amount is different in two steps using a mask having light transmittances different in two steps;
(c) developing a light-irradiated portion of the positive photosensitive coating film irradiated with a higher light irradiation amount to lay-open said transparent electrically conductive layer followed by electrodepositing a light shielding layer thereon;
(d) forming on the positive photosensitive coating film undeveloped in said step (c) a light-irradiated region where a light irradiation amount is different in two steps using a mask having light transmittances different in two steps;
(e) developing a light-irradiated portion of the photosensitive coating film irradiated with a higher light irradiation amount in the light-irradiated region formed in said step (d) to lay-open the transparent electrically conductive layer followed by electrodepositing a colored coating thereon to form a colored layer;
(f) forming on the positive photosensitive coating film undeveloped in said step (e) a light-irradiated region where a light irradiation amount is different in at least three steps using a mask having light transmittances different in two steps or a mask having light transmittances different in three steps;
and
(g) developing the photosensitive coating film in the light-irradiated region formed in said step (f) to lay-open the transparent electrically conductive layer followed by electrodepositing a colored coating thereon to form a colored layer, operation of said developing and electrodepositing in this step being sequentially repeated at least twice in an order of decreasing light irradiation amounts to thereby form at least a colored layer,
wherein a liquid selected from the group consisting of an electrodeposition liquid and a recovery liquid for recovery and re-use of an electrodeposition liquid after electrodeposition, and said transparent substrate having said transparent electrically conductive layer are relatively moved and contacted before said electrodepositing in at least one of said steps (c), (e) and (g).

6 more elements

Dependencies are inferred from the claim text.