Claims
- 1. A method for preparing a color filter which comprises the steps of:
- (a) preparing a transparent substrate having a front surface which carries transparent electroconductive layers and color layers on the transparent electroconductive layers, the front surface being covered with a layer of a negative photosensitive composition containing a black colorant,
- (b) exposing the transparent substrate to light emitted from a side opposite to the front surface of the transparent substrate followed by development to eliminate the negative photosensitive composition unexposed to light, to obtain a color filter,
- (c) checking the color filter to determine whether it has a defective part on the color layer such that adversely affects the display qualities, transferring said color filter having said defective part to the following steps (d) and (e),
- (d) eliminating the defective part of the color layer to produce a blank having a diameter of not more than 250 .mu.m there, to obtain a modified color filter, and
- (e) (i) returning the modified color filter to step (a).
- 2. The method according to claim 1, wherein the transparent substrate is a glass substrate and the color layers are red-, green-, blue- and black-color layers.
- 3. The method according to claim 1, wherein the elimination of the defective part is carried out using a laser beam.
- 4. The method according to claim 3, wherein the laser beam has a wavelength of 1 .mu.m or less.
- 5. A method for preparing a color filter which comprises the steps of:
- (a) preparing a transparent substrate having a front surface which carries transparent electroconductive layers and color layers on the transparent electroconductive layers, the front surface being covered with a layer of a negative photosensitive composition containing a black colorant,
- (b) exposing the transparent substrate to light emitted from a light emitting means positioned on a side opposite to the front surface of the transparent substrate followed by development to eliminate the negative photosensitive composition unexposed to light, to obtain a color filter,
- (c) checking the color filter to determine whether it has a defective part on the color layer such that adversely affects the display qualities, transferring said color filter having said defective part to the following steps (d) and (e),
- (d) eliminating the defective part of the color layer to produce a blank having a diameter of not more than 250 .mu.m there, to obtain a modified color filter, and
- (e) filling the blank of the modified color filter with a negative photosensitive composition containing a black colorant to obtain a second modified color filter and exposing the second modified color filter to light emitted from the light emitting means of step (b).
- 6. The method according to claim 5, wherein the transparent substrate is a glass substrate and the color layers are red-, green-, blue- and black-color layers.
- 7. The method according to claim 5, wherein the elimination of the defective part is carried out using a laser beam.
- 8. The method according to claim 7, wherein the laser beam has a wavelength of 1 .mu.m or less.
Priority Claims (1)
Number |
Date |
Country |
Kind |
6-275620 |
Oct 1994 |
JPX |
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CROSS-REFERENCE TO RELATED APPLICATIONS
This is a continuation-in-part of application Ser. No. 08/530,908, filed on Sep. 20, 1995, now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
4812387 |
Suzuki et al. |
Mar 1989 |
|
5531881 |
Matsumura et al. |
Jul 1996 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
6-109919 |
Apr 1994 |
JPX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
530908 |
Sep 1995 |
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