Process for applying a light-absorbing, electron permeable layer

Details Process for applying a light-absorbing, electron permeable layer Process for applying a light-absorbing, electron permeable layer

1977-10-11

1980-05-06

Esposito, Michael F.

Coating processes

Electrical product produced

Fluorescent or phosphorescent base coating

427 77, 427 78, 427109, 427123, 427255, 316 3, 316 5, 316 6, 316 7, 316 9, 316 10, 4272557, H01J 3126, H01J 922

Patent

active

042017971

ABSTRACT:
A process for applying within an image intensifier tube, in particular one of the proximity-focus type, a light absorbing, electron permeable layer on to a film coated on a layer of luminescent material applied to the anode of the tube. The layer is applied by evaporation of a low atomic weight element, preferably silicon or boron, or a compound of such an element, under conditions of high vacuum, preferably in the range of 10.sup.-5 to 10.sup.-6 torr, and up to a thickness of 1/4.lambda., where .lambda. is the average wavelength of the light which during operation of the tube impinges upon the photocathode thereof.

REFERENCES:
patent: 3040201 (1962-06-01), Lehmann
patent: 3167677 (1965-01-01), Fremuth
patent: 3692576 (1972-09-01), Takayanagi
patent: 3984581 (1976-10-01), Dobler
Powell et al., Vapor Deposition, pp. 346-349 & 403-404, (1966), John Wiley & Sons Inc. N.Y.

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