Shadow mask and cathode ray tube

Electric lamp and discharge devices – Cathode ray tube – Shadow mask – support or shield

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H01J 2980

Patent

active

055788980

ABSTRACT:
A shadow mask with a low thermal expandability of an Fe--Ni-based alloy and a high surface hardness is disclosed. This shadow mask includes a mask main body consisting of an Fe--Ni-based alloy containing iron and nickel as main constituents, a large number of fine electron beam apertures formed in the mask main body, and a surface layer formed on the surface of the mask main body and containing at least one compound selected from the group consisting of iron nitride, iron nickel nitride, iron boride, iron nickel boride, iron silicide, and iron nickel silicide.

REFERENCES:
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patent: 4217141 (1980-08-01), Schrittweiser
patent: 4292565 (1981-09-01), Kanto
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patent: 4665338 (1987-05-01), Inaba et al.
patent: 4698545 (1987-10-01), Inaba et al.
patent: 4777340 (1988-10-01), Kobayashi et al.
patent: 4806175 (1989-02-01), Wendt
patent: 4810927 (1989-03-01), Watanabe
patent: 4853049 (1989-08-01), Loyd
patent: 4872924 (1989-10-01), Kumada et al.
patent: 5028836 (1991-07-01), Hirasawa
Chemical Rubber Co. "Hand Book of Chemistry and Physics" 43rd Edition 1961 pp. 1530-1531, 1534-1535.
Japanese Patent Disclosure (KOKAI) No. 3-266338 (English Abstract), Nov. 1991.

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