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:
Feb. 14, 1995
Filed:
Jan. 07, 1994
Applicant:
Inventors:
Alex Gyure, Sunnyvale, CA (US);
John Berg, Boise, ID (US);
Damian Carver, Boise, ID (US);
Pete Manos, Boise, ID (US);
Assignee:
Zilog, Inc., Campbell, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437 52 ; 437 44 ; 437 48 ;
Abstract
A method of forming ROM transistor memory cell including not forming lightly doped regions in the semiconductor substrate for some of the memory cells so as to form one type of memory cell and forming the lightly doped regions in another type of memory cell.