The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1977
Filed:
Aug. 27, 1975
Applicant:
Inventors:
Yoshio Enoki, Katano, JA;
Nobumasa Ohshima, Hirakata, JA;
Assignee:
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
252501 ; 96-18 ;
Abstract
This invention provides a method for preparing a photoconductive powder comprising firing a combined starting mixture of CdSe, ZnS, ZnO, a Cu or Ag salt, and a Cd or Zn chloride or bromide as a flux, and preferably a Mn salt also, at a temperature higher than the melting point of the flux, cooling the fired product, and re-firing the cooled product in a sulfur vapor containing atmosphere. The photoconductive powder obtained by this method has high photosensitivity, high threshold voltage and fine particle size.