Process for preparing black matrix for a color tube by etching

Details Process for preparing black matrix for a color tube by etching Process for preparing black matrix for a color tube by etching

1995-06-06

1996-10-29

Chea, Thorl

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

With light-absorbing matrix on faceplate

430 28, 430 29, 430291, 430325, G03C 500

Patent

active

055695710

ABSTRACT:
A process for preparing a black matrix comprising the steps of producing a developed substrate by coating, drying, exposing and developing a photoresist on the inside of a substrate, producing a dried substrate by drying the developed substrate several times, coating a dye on the dried substrate and then drying the board, coating graphite on the dried substrate, and etching the graphite-coated substrate. This method makes it possible to perfectly etch the black matrix dot and increase volatility in fluorescent coating.

REFERENCES:
patent: 4681824 (1987-07-01), Tomita

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