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. 18, 2008
Filed:
Jul. 13, 2005
Shinya Konishi, Kanagawa, JP;
Shinya Konishi, Kanagawa, JP;
NEC Electronics Corporation, Kawasaki, Kanagawa, JP;
Abstract
A nonvolatile semiconductor memory includes a memory cell array and a replacement data cell array. The memory cell array includes a plurality of main cell arrays and a plurality of redundancy cell arrays. The replacement data cell array stores a replacement data indicating a replacement of one main cell array by one redundancy cell array. The replacement data cell array includes a plurality of first storage sections and a plurality of second storage sections. The first storage section corresponds to one redundancy cell array and stores a replacement confirmation data indicating whether or not the corresponding one redundancy cell array replaces one main cell array, by nonvolatile memory cells of two bits. The second storage section corresponds to one redundancy cell array and stores an address data indicating an address for one main cell array which is replaced by the corresponding one redundancy cell array.