Method for darkening a color-selection electrode

Details Method for darkening a color-selection electrode Method for darkening a color-selection electrode

1990-10-09

1992-01-07

Woo, Jay H.

Metal treatment

Process of modifying or maintaining internal physical...

Processes of coating utilizing a reactive composition which...

148254, 313402, 313408, 427 64, 427 68, C23C 1602

Patent

active

050788124

ABSTRACT:
A method for making a dark, adherent coating on exposed metal surfaces of a color-selection electrode assembly of a CRT includes the steps of applying a first solution of aqueous phosphoric acid to the metal surfaces of the assembly; contacting the metal surfaces with a second solution of selenium dioxide and methanol; rinsing the assembly; and then, applying a sealing solution to the surfaces of the assembly.

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patent: 4819489 (1989-04-01), Nelson et al.
patent: 4885501 (1989-12-01), Tong
patent: 4929864 (1990-05-01), Tong

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