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2 054 731

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C1

(51)

IPC

(21) (22)

Application

92002197/07, 1992-10-26

(22)

Actual filing date

1992-10-26

(45)

Published

1996-02-20

(72)

Inventor

Saminskij L.A.Polivin S.N.Shekhmejster E.I.

(73)

Holder

Moskovskij Ehlektrolampovyj Zavod

METHOD FOR BLACK MATRIX GENERATION ON COLOR TUBE SCREEN Russian patent published in 1996 - IPC

Abstract RU 2054731 C1

FIELD: electronic engineering. SUBSTANCE: screen glass surface is coated with polyvinyl alcohol film doped with photosensitizing agent, exposed through shadow mask, and wetted with electrolyte solution having pH value of 3.5-5.0, such as ammonium synchromate solution of 0.001-1 mass-percent concentration. Then tanned pattern of film is developed, screen is wetted with surface-active solution, covered with layer of finely dispersed graphite, etched with hydrogen pyroxide, and rinsed with water. Hole produced by this method depends on pH value of electrolyte aqueous solution. EFFECT: facilitated procedure. 3 cl, 1 dwg

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RU 2 054 731 C1

Authors

Saminskij L.A.

Polivin S.N.

Shekhmejster E.I.

Dates

1996-02-20—Published

1992-10-26—Filed

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