Method for manufacturing a shadow mask

Details Method for manufacturing a shadow mask Method for manufacturing a shadow mask

1988-10-24

1991-04-09

Dees, Jose G.

Radiation imagery chemistry: process, composition, or product th

Producing cathode-ray tube or element thereof

430935, 430323, 427209, 427379, 156644, 1566591, G03F 716

Patent

active

050064320

ABSTRACT:
A shadow mask is formed by forming two photosensitive resin layers respectively on both major surfaces of a band-like metal sheet. The first resin layer is formed by coating a resin solution on the first major surface with the first major surface directed upward, and drying the solution while maintaining the metal sheet horizontal. Likewise, the second resin layer is formed by coating a resin solution of the second major surface with the second major surface directed upward, and drying the solution while maintaining the metal sheet horizontal. Predetermined openings are made in the first and second resin layers by exposing and developing. Then, the bared portions of metal sheet are etched to form apertures therein.

REFERENCES:
patent: 2750524 (1956-06-01), Braham
patent: 3782995 (1974-01-01), Takimoto et al.
patent: 4061529 (1977-12-01), Goldman et al.
patent: 4210843 (1980-07-01), Avadani
patent: 4565755 (1986-01-01), Ohtake et al.
patent: 4755257 (1988-07-01), Yamamoto et al.
patent: 4871584 (1989-10-01), Weber

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