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:
Jan. 25, 2000
Filed:
Jul. 06, 1998
Mamoru Fujita, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
A semiconductor memory device is provided that includes a plurality of normal memory cells, a device for activating the memory cells in response to an externally applied address and a plurality of redundant memory cells. A memory and comparison device may include a device for storing an address of a failed memory cell existing within a plurality of normal memory cells and a device for comparing the externally applied address with the failed memory cell address. A redundant memory cell selection device may select any one of a plurality of redundant memory cells in response to an output signal output from the memory and comparison device. A redundant memory cell activating device may activate the redundant memory cell, responsive to an output of the memory and comparison device.