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. 07, 1983
Filed:
Feb. 24, 1981
Applicant:
Inventors:
Bernard A Denis, Mennecy, FR;
David B Eardley, Stanfordville, NY (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365179 ; 365156 ;
Abstract
Two memory cells each can be entirely fabricated in only two isolation beds. In one embodiment each bed contains one lateral PNP and one vertical NPN transistor in a merged structure. In a second embodiment, each bed contains one lateral PNP and two vertical NPN transistors in a merged structure. Memory access circuitry provides a high ratio of selected to unselected cell current in order to permit fast memory operation.