X-ray image intensifier and method of manufacturing the same

Details X-ray image intensifier and method of manufacturing the same X-ray image intensifier and method of manufacturing the same

1988-12-20

1990-03-06

Yusko, Donald J.

Electric lamp and discharge devices

Photosensitive

Having phosphor screen

313467, 2504861, 427 64, 427 68, H01J 2920, B05D 512

Patent

active

049068938

ABSTRACT:
An output phosphor film used in an output screen of an image intensifier is made of ZnS or (Zn, Cd)S host material and at least one activator element selected from the group consisting of Cu, Ag, Au, Al, and Cl. The phosphor film is formed on a face plate by means of chemical vapor-deposition, or physical vapor deposition in an inert-gas atmosphere having a pressure of 1 Pa or more, and is heat-treated. The formed phosphor film has hexagonal (Wurtzite-type) crystal and/or cubic (sphalerite-type) crystal structure. These crystals are orientated such that the (002) planes of the hexagonal crystals and/or the (111) planes of the cubic crystals are substantially parallel to the face plate.

REFERENCES:
patent: 2435436 (1948-02-01), Fonda
patent: 3984587 (1976-10-01), Lipp
patent: 4140940 (1979-02-01), Uehara et al.

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