Method of producing phosphor screen of color picture tube

Details Method of producing phosphor screen of color picture tube Method of producing phosphor screen of color picture tube

1985-08-08

1987-03-24

Morgenstern, Norman

Coating processes

Electrical product produced

Welding electrode

219121LH, 219121LJ, 427 68, 427226, 427228, 427244, 427270, 427271, 427282, 430 24, 430 25, 430945, B05D 306, B05D 506

Patent

active

046524622

ABSTRACT:
Disclosed herein is a method of producing a phosphor screen of color picture tube wherein a light absorbing material is applied onto the inner surface of a panel, a shadow mask is provided, the surface of film of the light absorbing material is scanned and irradiated with a laser beam via the shadow mask so that portions of the light absorbing material irradiated with the laser beam are heated and burned, thereby to form a black matrix. According to this method, the number of steps for forming the black matrix is decreased, and the quality and yield of the phosphor screen are increased.

REFERENCES:
patent: 3558310 (1971-01-01), Mayaud
patent: 3574657 (1971-04-01), Burnett
patent: 3637410 (1972-01-01), Stevens
patent: 4117177 (1978-09-01), Schlater
patent: 4268186 (1981-04-01), Provancher
patent: 4388517 (1983-06-01), Schulte et al.

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