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:
Nov. 07, 1995
Filed:
Nov. 23, 1994
Applicant:
Inventor:
Seiichi Hannai, Tokyo, JP;
Assignee:
NEC Corporation, Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11C / ;
U.S. Cl.
CPC ...
365200 ; 36518905 ; 36523003 ;
Abstract
A semiconductor memory device has a plurality of memory cell sub-arrays selectively used as a data storage for prohibiting a defective memory cell sub-array from a data access, and a shifting circuit couples the available memory cell sub-arrays to input and output data buffer circuits higher in a priority than another input and output data buffer circuit regardless of the location of the defective memory cell sub-array in the plurality of memory cell sub-arrays so as to share a printed circuit board between the semiconductor memory devices with the partially available memory cell sub-arrays.