Color picture tube having a shadow mask with a Cr enriched layer

Details Color picture tube having a shadow mask with a Cr enriched layer Color picture tube having a shadow mask with a Cr enriched layer

1985-09-17

1987-10-06

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, H01J 2907

Patent

active

046985450

ABSTRACT:
Color picture tube in which a tube element, e.g., the shadow mask, is constituted by an Fe alloy to which 25-45 wt % of Ni and at least some Cr are added. A Cr rich layer is formed on the tube element surface and black oxide film with a spinel structure containing Cr is formed on the surface of this film.

REFERENCES:
patent: 4131494 (1978-12-01), Momose et al.

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