Method of manufacturing a cathode ray tube for displaying colore

Details Method of manufacturing a cathode ray tube for displaying colore Method of manufacturing a cathode ray tube for displaying colore

1978-04-03

1979-07-10

Lazarus, Richard B.

Metal working

Barrier layer or semiconductor device making

Barrier layer device making

29 2514, H01J 902

Patent

active

041603117

ABSTRACT:
A method of manufacturing a focusing shadow mask for a color cathode ray tube is disclosed in which two conductive plates, forming the electrode structure, are secured together by insulating material so that they do not contact each other. Prior to assembly, at least one of the plates is provided with a pattern of substantially parallel ridges joined together by strips much thinner than the ridges. The material of the thin strips is removed after the plates are secured together, so that the remaining ridge portions form a set of conductors with the spaces therebetween being aligned with apertures on the other plate to form a plurality of openings for passage of electron beams.

REFERENCES:
patent: 3186883 (1965-06-01), Frantzen
patent: 3787106 (1974-01-01), Schermerhorn
patent: 3799816 (1974-03-01), Schneble, Jr. et al.
patent: 3923566 (1975-12-01), Law
patent: 4059781 (1977-11-01), VAN Alphen et al.

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