| 摘要 |
1506159 Tin oxide coating PHOTON POWER Inc 8 Jan 1975 [8 Jan 1974] 40207/77 Divided out of 1506158 Heading C1A [Also in Division H1] A transparent conductive film of tin oxide is provided on a glass surface by heating the surface to a uniform temperature overall and substantially maintaining this temperature while a portion of the surface is sprayed with an anhydrous tin-containing material in an oxygen atmosphere. The film is preferably the first of several formed in a continuous process at the output end of a float glass manufacturing plant, the temperature of the glass decreasing in succeeding deposition steps but being maintained throughout each step by contact with a molten metal bath over which it runs, though the glass may optionally be pretreated with H 2 SiF 6 at 520‹ F. to form a sodium ion barrier of silica. It is coated with 0À4 Á of tin oxide while held at 950‹ F. in air by spraying with a mixture of tin dichloride, phenylhydrazine hydrochloride and ammonium fluoride in methanol, and after annealing to 700‹ F. is coated with 2 Á of cadmium sulphide from a solution of cadmium chloride, aluminium chloride, and N,N-dimethyl thiourea or thiourea in water sprayed from one or more nozzles traversing the moving glass strip. After annealing to 300‹ F. a 1000Š copper sulphide layer is produced by similarly spraying with a solution of copper acetate and N,N-dimethylurea. The rate of deposition can be increased by replacing the nozzles with rotating bell-type electrostatic atomizers. Further processing to produce photovoltaic cells is described. Specifications 1,506,158 and 1,506,160 containing the same disclosure are referred to. |
