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:
Nov. 16, 1976
Filed:
May. 19, 1975
Applicant:
Inventor:
Robin Frederick Farrow, Malvern, EN;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01L / ; H01L / ;
U.S. Cl.
CPC ...
148175 ; 29572 ; 136 89 ; 156612 ; 357 16 ; 357 30 ; 427 87 ; 427314 ;
Abstract
Group III-V compound substrates are heat cleaned under vacuum conditions by heating above their congruent temperature and subjecting the substrate to at least one molecular beam of the material preferentially evaporating from the substrate thereby maintaining surface stoichiometry. Surfaces so cleaned may then have an epitaxial layer grown thereon under similiar conditions from molecular beams. Alternatively the cleaned surface may be coated with cesium and oxygen to form a photocathode.