Shadow mask for a color cathode ray tube

Details Shadow mask for a color cathode ray tube Shadow mask for a color cathode ray tube

1984-08-13

1987-12-29

Moore, David K.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313473, 445 47, 445 58, H01J 2980

Patent

active

047163330

ABSTRACT:
A color cathode ray tube contains a shadow mask having a layer consisting essentially of a ceramic material, such as lead borate glass, on at least one side of the major face of the mask. Thermal expansion of the shadow mask is limited by bonding the ceramic layer to the shadow mask at a temperature at least as high as the normal operating temperature of the shadow mask. When the mask cools to room temperature, it does not fully contract but retains a residual tensile stress because of the bonded ceramic layer.

REFERENCES:
patent: 3668002 (1972-06-01), Okabe et al.
patent: 3802757 (1974-04-01), Benda et al.
patent: 3887828 (1975-03-01), Bathelt et al.
patent: 4002941 (1977-01-01), Demmy
patent: 4317749 (1982-03-01), Provance et al.
patent: 4339687 (1982-07-01), Redington
patent: 4442376 (1984-04-01), Van Der Waal et al.

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