Display screen having aluminum phosphate barrier layer and metho

Details Display screen having aluminum phosphate barrier layer and metho Display screen having aluminum phosphate barrier layer and metho

1982-06-01

1985-11-05

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Screen

313473, 427 68, H01J 2928, H01J 2910, B05D 506

Patent

active

045516529

ABSTRACT:
Corrosion of an aluminium film on the display screen of a display tube as a result of an electro-chemical reaction between water and aluminium is substantially prevented by providing the aluminium with an aluminium phosphate layer at the area where it adjoins the carbon particles. This may be done by rinsing or spraying the carbon particles with an at most 2% by weight phosphoric acid solution in water prior to or after providing the aluminium film.

REFERENCES:
patent: 3703401 (1972-11-01), Deal et al.
patent: 3911165 (1975-10-01), Kanai et al.
patent: 4025661 (1977-05-01), Moscony et al.
patent: 4407916 (1983-10-01), Akagi et al.

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