Improvements in and relating to dry rectifiers and photo-electric cells

摘要

500,094. Asymmetrically - conducting resistances. BRITISH THOMSON-HOUSTON CO., Ltd. Junc 3, 1938, Nos. 16687 and 16688. Convention dates, June 5, 1937 and June 12, 1937. Addition to 497,034. Drawings to Specification. [Class 37] [Also in Group XL] The process according to the parent Specification is utilized for the manufacture of photo-electric cells, and, where metal is used for the treatment of the superficial oxide layer, such metal treatment is continued after the oxide film has been rendered conductive, so as to form a film on the surface, whereby the formation of the crystalline modification of the selenium deposited thereon is facilitated. This latter part of the process is applicable to the manufacture of dry rectifiers and of photoelectric cells.