Method of manufacturing a shadow mask of the nickel-iron type

Details Method of manufacturing a shadow mask of the nickel-iron type Method of manufacturing a shadow mask of the nickel-iron type

1996-11-06

1998-02-10

Bradley, P. Austin

Electric lamp or space discharge component or device manufacturi

Process

Electrode making

313402, H01J 914

Patent

active

057162522

ABSTRACT:
A method of manufacturing a shadow mask of the nickel-iron type, in which an aperture-patterned sheet of a nickel-iron alloy comprising 35-37% by weight of Ni and less than 0.1% by weight of each constituent of the group of Mn, Cr and Si and at most 0.9% by weight of Co is given a thermal treatment for obtaining an ASTM grain number of .gtoreq.7, and the sheet thus obtained is given the desired shape of a shadow mask having a thermal expansion coefficient of .ltoreq.0.9.times.10.sup.-6 /.degree.C.

REFERENCES:
patent: 4685321 (1987-08-01), Van Den Berg et al.
patent: 5026312 (1991-06-01), Van Den Berg

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