Front end elements for a color cathode ray tube

Details Front end elements for a color cathode ray tube Front end elements for a color cathode ray tube

1984-05-17

1987-05-12

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313407, H01J 2980

Patent

active

046653384

ABSTRACT:
A front end element, such as a shadow mask, for a color cathode ray tube is made from an alloy including iron and nickel as its principal components; and a black oxide layer is formed integrally on the alloy base. The black oxide layer consists essentially of a spinel-type oxide with the formula Ni.sub.x Fe.sub.(3-x) O.sub.4, where x is a positive number less than 3. A front end element constructed in this way produces a higher quality picture because of reduced thermal expansion.

REFERENCES:
patent: 3760214 (1973-09-01), Yamazaki et al.
patent: 3804601 (1974-04-01), Kaplan
patent: 4285106 (1981-08-01), Alder
patent: 4292565 (1981-09-01), Kanto

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