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:
Jul. 29, 2003
Filed:
Jun. 05, 2001
Applicant:
Inventor:
Kenji Hibino, Tokyo, JP;
Assignee:
NEC Electronics Corporation, Kanagawa, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 7/02 ;
U.S. Cl.
CPC ...
G11C 7/02 ;
Abstract
A semiconductor memory device includes: a memory cell region having main virtual ground lines; and a reference cell region having reference virtual ground lines, and the reference cell region having substantially the same interconnection routine as the memory cell region, wherein, in the reference cell region, adjacent reference cells to a selected reference cell to be referred are off-bit cells.