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:
May. 30, 1989
Filed:
Nov. 26, 1984
Applicant:
Inventor:
Peter T Panousis, Allentown, PA (US);
Assignee:
American Telephone and Telegraph Company, AT&T Bell Laboratories, Murray Hill, NJ (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
357 234 ; 357 2311 ; 357 55 ; 437 38 ; 437203 ;
Abstract
The specification describes several forms of trench gate MOS transistors and methods for making them. The structure further includes a pair of sidewall guards on opposing sidewalls to prevent inversion of the sidewalls when the trench gate is turned on.