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. 05, 2002
Filed:
Oct. 06, 1999
Hiroshi Shimizu, Kawasaki, JP;
Keizo Aoyama, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In the peripheral area of a semiconductor chip A, there is arranged a macro cell which comprises a fuse circuit having a plurality of fuse circuit units, each of which has a fuse and outputs a signal indicating whether or not the fuse is cut off, and a predecoder receiving the outputs of the fuse circuit. In the interior of the chip A, there is arranged a macro cell which comprises a main decoder receiving the outputs of the predecoder, a signal conversion circuit for converting the outputs of the main decoder to generate a conversion signal, and a memory circuit The memory circuit comprises a plurality of normal memory blocks and a redundant memory block with the same configuration to each other, and a switching circuit for, in response to the conversion signal, making a defect one of the normal memory blocks out of use with making the redundant memory block in use.