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:
Mar. 18, 1997
Filed:
May. 01, 1996
Applicant:
Inventors:
Yasuo Sato, Tokyo, JP;
Shigeki Amano, Tokyo, JP;
Assignee:
Nippon Steel Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01L / ;
U.S. Cl.
CPC ...
437 43 ; 437 48 ; 437 60 ;
Abstract
A DRAM includes a main section including a DRAM memory cell array including a plurality of DRAM cells arranged in an array, a spare section including a Spare DRAM memory cell array including a plurality of DRAM memory cells arranged in an array, an address decoder for specifying addresses respectively of the DRAM memory cell array and the spare DRAM memory cell array, and a defective bit replacement control circuit which is connected to the address decoder and which includes a plurality of electrically rewritable nonvolatile memory cells.