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:
Dec. 08, 1987
Filed:
Oct. 04, 1985
Applicant:
Inventors:
Nobuyoshi Tanimura, Musashino, JP;
Tokumasa Yasui, Kodaira, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365 51 ; 365 53 ; 365184 ;
Abstract
Herein disclosed is a semiconductor memory device which is composed of a peripheral circuit unit equipped with a gate protection circuit having a protection resistor and a memory cell unit so that it can be used as an MISFET type static RAM and which is characterized in that the protection resistor is made of a polycrystalline silicon film having substantially the same resistivity as that of an overlying polycrystalline silicon film formed to merge into the load resistor of the memory cell unit.