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:
May. 28, 2002
Filed:
Apr. 11, 2000
Mamoru Fujita, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A semiconductor memory device in which a memory cell array is divided into a plurality of operation blocks and one regular word line is activated simultaneously in each of two or more operation block. In the semiconductor memory device, when a defective regular word line is set for replacement with a spare word line, data is recorded in fuse ROM (read only memory) in the semiconductor memory device such that a regular word line to be replaced and a replacing spare word line are located in the same operation block or not located each in combined operation blocks which are activated simultaneously. This can prevent the simultaneous activation of a regular word line and a spare word line in the same operation block and malfunction of the semiconductor memory device.