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. 24, 1998
Filed:
Jun. 07, 1995
Mitsubishi Denki Kabushiki Kaisha, Tokyo, JP;
Abstract
In repairing a defective memory cell of a data memory placed in a data memory region, a repairing circuit which employs a repairing method causing some access penalty but having high repairing efficiency is located in a redundant row region and a redundant column region in the data memory region. On the other hand, in repairing a defective memory cell of a tag memory placed in a tag memory region, a repairing circuit which employs a repairing method having low repairing efficiency but causing little access penalty is located in a redundant column region in the tag memory region. Accordingly, optimal repair of a defective memory cell can be achieved according to respective functions of the tag memory and the data memory.