Multi-graded aperture masks

Details Multi-graded aperture masks Multi-graded aperture masks

1986-06-13

1988-05-10

DeMeo, Palmer C.

Electric lamp and discharge devices

Cathode ray tube

Shadow mask, support or shield

313403, H01J 2907

Patent

active

047437952

ABSTRACT:
An aperture mask having a grade side and a cone side with a plurality of openings of substantially the same size with the plurality of openings having a grade side partially etched region and a cone side partially etched region surrounding the plurality of openings, the grade side partially etched region surrounding the plurality of openings decreasing from the center of the mask to the periphery of the mask.

REFERENCES:
patent: 4303466 (1981-12-01), Thoms

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