Method for manufacturing a shadow mask

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

1984-09-19

1987-08-25

Czaja, Donald E.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156345, 156640, 156656, 1566611, 156664, 430312, 430313, 430318, C23F 102, B44C 122

Patent

active

046891145

ABSTRACT:
In a method for manufacturing a shadow mask, the both surfaces of a metal sheet, except those regions in which small and large openings are to be formed, are coated with resist films. The upper surface of the metal sheet is further coated with an organic synthetic film. An etching solution is sprayed on the lower surface of the metal sheet, kept in a substantially horizontal position, to etch the region corresponding to the small opening, thereby forming small recesses. Thereafter, the resist film on the lower surface is removed. Then, the metal sheet is turned over, so the surface of the metal sheet with the small recesses therein faces up, and an etching-resistant layer is formed on the surface of the metal sheet which faces up. Then, the regions corresponding to the large openings on the surface of the metal sheet which faces down is etched, to form large recesses, while keeping the metal sheet substantially horizontal, until the large recesses are reached to the resistant layer. Thus, each aperture is formed. Thereafter, the resist film and the resistant layer are removed. Thus, a shadow mask is manufactured which has a number of apertures regularly arranged therein, so the areas of the both openings of each aperture on the two surfaces of the shadow mask are different.

REFERENCES:
patent: 3971682 (1976-07-01), Frantzen
patent: 4013498 (1977-03-01), Frantzen et al.
patent: 4124437 (1978-11-01), Bond et al.

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