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. 12, 1979
Filed:
Aug. 18, 1977
Applicant:
Inventors:
Assignee:
Tokyo Shibaura Electric Co., Ltd., Kawasaki, JP;
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
29571 ; 29578 ; 204 15 ; 204 / ;
Abstract
The exposed surface of a semi-insulating compound semiconductor substrate is anodized while light is irradiated to the exposed surface to form a gate insulating film on the substrate between source and drain regions.