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. 02, 1982
Filed:
Jun. 06, 1980
Applicant:
Inventors:
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365179 ; 357 40 ; 365174 ;
Abstract
The invention relates to an improvement in a semiconductor memory device including flip-flop type memory cells, each memory cell consisting of a pair of cross-coupled multi-emitter transistors. The semiconductor memory device of the invention is characterized by including a capacitance added between the collector region and the base region of each of the transistor pair of each memory cell in order to prevent the memory cell from erroneously operating due to .alpha.-rays.