Method for preparing a color filter

Details Method for preparing a color filter Method for preparing a color filter

1996-12-11

1998-07-21

McPherson, John A.

Radiation imagery chemistry: process, composition, or product th

Radiation modifying product or process of making

Screen other than for cathode-ray tube

430321, G02B 520

Patent

active

057833397

ABSTRACT:
Color layers of a color filter obtained by exposing a transparent substrate to light from the back side followed by development may have a defect of layer unflatness produced due to unevenness caused by contamination with foreign matters. The defect can be repaired by eliminating the defective part of the color layers to produce a blank there, optionally filling the blank with a negative photosensitive composition containing a black colorant and returning the thus modified color filter to an appropriate step in the production line. The color filter repaired is used to fablicate multi-color display devices which are by no means inferior in display qualities to those fablicated using a color filter having no defect originally.

REFERENCES:
patent: 4812387 (1989-03-01), Suzuki et al.
patent: 5531881 (1996-07-01), Matsumura et al.

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