Method for producing color cathode ray tube aperture masks

Metal working – Barrier layer or semiconductor device making – Barrier layer device making

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H01J 2907

Patent

active

042851068

ABSTRACT:
In a process for preparing aperture mask assemblies for color cathode ray tubes, an improvement provides thicker, more adherent protective oxide coatings on the bimetallic mounting members of such assemblies by employing the step of mechanically roughening the surface of the mounting members prior to oxidation.

REFERENCES:
patent: 3351996 (1967-11-01), Fiore
patent: 3468005 (1969-09-01), Kautz
patent: 3621318 (1971-11-01), Lewinson
patent: 3693223 (1972-09-01), Kaplan
patent: 3722043 (1973-03-01), Kirchner
patent: 3765923 (1973-10-01), Bender-Christensen

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