Method for shadow mask protection during manufacture

Details Method for shadow mask protection during manufacture Method for shadow mask protection during manufacture

1986-04-15

1987-07-14

Newsome, John H.

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427156, 430 23, B05D 512

Patent

active

046801960

ABSTRACT:
A method is disclosed for use in the manufacture of a color cathode ray tube having a shadow mask with a pattern of minute apertures for color selection. A removable film effective to prevent particle occlusion of the apertures is disposed on at least one side of the mask. The film has an extremely small, substantially uniform thickness dimension, a low index of refraction, and is of such high transparency as to exhibit a negligible optical effect during photoscreening operations.

REFERENCES:
patent: 3066033 (1962-11-01), Clark
patent: 3201274 (1965-08-01), Hobbs
patent: 3616732 (1971-11-01), Rucinski
patent: 3670376 (1972-06-01), Uchida et al.
patent: 3676914 (1972-07-01), Fiore
patent: 3906133 (1975-09-01), Flutie
patent: 3931442 (1976-01-01), Rollason
patent: 3935036 (1976-01-01), Kinsch
Ahn et al, IBM Tech. Disc. Bull., vol. 14, No. 11, Apr. 1972, p. 3426.
Hershel, SPIE, vol. 275, Semiconductor Microlithography VI, 1981, pp. 23-28.

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