Method of making a photoconductive layer for an image converting panel
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsNobumasa Ohshima, Kinya Himeno, Norihiro Tani, Yoshio Enoki
Life of this patent
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Abstract
A photoconductive layer having superior characteristics is made by steps of suspending uniformly photoconductive particles in a viscous solution by stirring, pouring the stirred mixture of the photoconductive particles, binder and solvent on a substrate which is put horizontally at a bottom of a container, precipitating the photoconductive particles on the surface of the substrate so as to form a wet photoconductive layer, removing the clear solution on the wet photoconductive layer, drying the wet photoconductive layer and baking the dried photoconductive layer.
Claims7
A method of making a photoconductive layer for an image converting panel, comprising steps of:
- uniformly suspending photoconductive particles having an average diameter of 1 to 20 microns in a viscous solution by stirring for 15 seconds to 20 minutes, said viscous solution being kept at a temperature of 15.degree. to 40.degree.C and comprising a cellulose resin as a binder for combining said photoconductive particles and an organic solvent selected from the group consisting of toluene, xylene, n-butyl-acetate, ethyl alcohol, iso-amyl alcohol and iso-propyl alcohol, the concentration of said binder in said solution being 0.5 to 5 percent;
- putting an electrically conductive substrate, on which the photoconductive layer is to be formed, horizontally at the bottom of a container;
- pouring the stirred viscous mixture of said photoconductive particles, said binder and said solvent into said container;
- precipitating said photoconductive particles on the surface of said substrate in said viscous solution so as to form a wet photoconductive layer on said substrate;
- removing a clear solution on said wet photoconductive layer to the outside of said container;
- slowly drying said wet photoconductive layer in an atmosphere saturated by vapor of said solvent;
- and baking the dried photoconductive layer at a temperature of 60.degree. to 160.degree.C, the thickness of the photoconductive layer being 300 to 600 microns.
Dependencies are inferred from the claim text.