Preparation of radiation image storage panel
AssigneeFuji Photo Film Co., Ltd.
InventorsAtsunori Takasu, Hiroshi Matsumoto, Makoto Kashiwaya
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Abstract
A method for preparing a radiation image storage panel by heating an evaporation source of phosphor material or starting materials for the phosphor material under reduced pressure to produce a vapor of the phosphor material or starting materials and deposit the vapor on a substrate to form a phosphor layer is favorably performed by using an evaporation source having a water content of not more than 0.5 weight %, preferably under the conditions of a partial pressure of water of 7.0×10−3 Pa or lower and a partial pressure of hydrocarbon of 1.0×10−6 Pa or lower.
Claims19
A method for preparing a radiation image storage panel by heating an evaporation source comprising phosphor material or starting materials for the phosphor material under reduced pressure to produce a vapor of the phosphor material or starting materials and deposit the vapor on a substrate to form a phosphor layer thereon, wherein the evaporation source has a water content of not more than 0.5 weight %.
A radiation image storage panel having a phosphor layer formed by vapor deposition, wherein the phosphor layer compress an alkali metal halide phosphor having the formula (I):
- MIX.aMIIX′2.bMIIIX″3:zA (I)
- in which MI is at least one alkali metal element selected from the group consisting of Li, Na, K, Rb and Cs;
- MII is at least one alkaline earth metal element or divalent metal element selected from the group consisting of Be, Mg, Ca, Sr, Ba, Ni, Cu, Zn and Cd;
- MIII is at least one rare earth element or trivalent metal element selected from the group consisting of Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Al, Ga and In;
- each of X, X′ and X″ independently is at least one halogen selected from the group consisting of F, Cl, Br and I;
- A is at least one rare earth element or metal element selected from the group consisting of Y, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Na, Mg, Cu, Ag, Tl and Bi;
- and a, b and z are numbers satisfying the conditions of 0≦a≦0.5, 0≦b<0.5 and 0<z<1.0, respectively, and the phosphor layer contains not more than 10 ppm of alkali metal impurities and not more than 5 ppm of alkaline earth metal impurities, the alkali metal impurities and alkaline earth metal impurities meaning alkali metals and alkaline earth metals other than the alkali metals and alkaline earth metals constituting the alkali metal halide phosphor of the formula (I) in the phosphor layer.
A method for preparing a radiation image storage panel by heating a evaporation source comprising phosphor material or starting materials for the phosphor material under reduced pressure to produce a vapor of the phosphor material or starting materials and deposit the vapor on a substrate to form a phosphor layer thereon, wherein the production and deposition of vapor are performed at a partial pressure of water of 7.0×10−3 Pa or lower.
A method for preparing a radiation image storage panel by heating a evaporation source comprising phosphor material or starting materials for the phosphor material under reduced pressure to produce a vapor of the phosphor material or starting materials and deposit the vapor on a substrate to form a phosphor layer thereon, wherein the production and deposition of vapor are performed at a partial pressure of hydrocarbon of 1.0×10−6 Pa or lower.
Dependencies are inferred from the claim text.