Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating
Patent
1994-02-28
1995-08-29
Bell, Janyce
Coating processes
Electrical product produced
Fluorescent or phosphorescent base coating
4272553, 4272557, 427287, 427294, 427377, 4274191, B05D 506
Patent
active
054458463
ABSTRACT:
An X-ray imaging tube has an input phosphor screen including a substrate, a discontinuous phosphor layer formed on the substrate, and a continuous phosphor layer formed on the discontinuous phosphor layer. The discontinuous phosphor layer consists of a large number of columnar crystals separated from each other and containing a substance for absorbing light emitted from a phosphor upon incidence of an X-ray. Light-absorbing layers containing a compound of the substance and having a concentration of the element higher on outer surfaces thereof than that in interiors thereof are formed on adjacent side surfaces of the columnar crystals such that the light-absorbing layers are not present at an interface between the discontinuous phosphor layer and the continuous phosphor layer. The gap between the adjacent side surfaces of the columnar crystals is 0.1 .mu.m or more.
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Bell Janyce
Kabushiki Kaisha Toshiba
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