| 摘要 |
<p>1522332 Photoconductive layers WESTINGHOUSE ELECTRIC CORP 20 Aug 1975 [22 Aug 1974] 34533/75 Heading H1K In a method of making photoconductive layers, tablets which are formed of a powder such as ZnS, CdS, or CdTe, or a mixture of ZnS and ZnSe, CdS and CdSe, or CdS and CdTe, containing between 0À1 and 5À0% by weight of a copper halide powder, are evaporated in a partial vacuum at a rate greater than 10 nanometers per minute on a substrate spaced preferably at a distance of 30 cms. from the tablets, and the layer formed is then baked in oxygen at a temperature betweeen 300 and 550‹ C. for less than six minutes. The tablets, typically ¢ inch in diameter and ¥ inch in height, are formed by cold-pressing. The substrate is preferably a cleaned anodized aluminium foil, though various other suitable materials have been mentioned. Ohmic contacts with or without using a mask may be applied to the layer prior to the baking. Thickness of the layer may be monitored during evaporation of the tablets using a crystal sensor, and preferably the thickness of the layer is between 1 and 5 microns.</p> |
