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:
Jan. 18, 1977
Filed:
Sep. 12, 1974
Applicant:
Inventors:
Frank E Holmes, Willowdale, CA;
Clement A Salama, Toronto, CA;
Assignee:
Canadian Patents and Development Limited, Ottawa, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01J / ;
U.S. Cl.
CPC ...
29571 ; 29580 ; 357 23 ; 357 55 ;
Abstract
A MOS transistor fabrication method using either three or four masking steps and wherein the channel between source and drain is defined by preferential etching of the semiconductor material resulting in a relatively deep V-shaped groove formed in the material between source and drain with the channel passing around this V-groove.