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. 19, 1999
Filed:
Aug. 22, 1996
Chisa Makimura, Hamura, JP;
Yukihide Suzuki, Akishima, JP;
Shunichi Sukegawa, Tsukuba, JP;
Hiroyuki Fujiwara, Tsuchiura, JP;
Masayuki Hira, Tachikawa, JP;
Hitachi Ltd., Tokyo, JP;
Texas Instuments Incorporated, Dallas, TX (US);
Abstract
A semiconductor storage device is provided with a storage circuit for a faulty address and a plurality of redundant word lines corresponding to the storage circuit. The storage circuit is adapted to store a faulty address required for selecting a redundant word line. The faulty address is compared with an address input at the time of memory access by a comparator. Using a coincidence signal produced from the comparator and a predetermined address signal contained in the input address, a defect relief circuit selects one of the redundant word lines in place of the faulty word line.