Method for manufacturing shadow mask

Details Method for manufacturing shadow mask Method for manufacturing shadow mask

1983-03-24

1983-12-13

Powell, William A.

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

1566591, 252 792, C23F 102

Patent

active

044203667

ABSTRACT:
A method for manufacturing a shadow mask by spraying an Fe-Ni alloy sheet with a ferric chloride solution to form apertures for passing an electron beam the ferric chloride solution is controlled to have 0.30.+-.0.20% by weight of free hydrochloric acid within a ferric chloride solution temperature range between 40.degree. C. and 70.degree. C., to have a total amount of Fe.sup.++ ions and Ni.sup.++ ions of not more than 15% by weight, and to have a specific gravity which falls within a region bounded between a curve plotted according to a relation 1.461-(4.63.times.10.sup.-4 T)-(1.96.times.10.sup.-6 .times.T.sup.2) (where T is a ferric chloride solution temperature) and a curve plotted according to a relation 1.552+(7.79.times.10.sup.-5 .times.T)-(1.18.times.10.sup.-5 .times.T.sup.2).

REFERENCES:
patent: 2684892 (1954-07-01), Saulnier
patent: 3824136 (1974-07-01), Gilbert

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