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. 04, 2003
Filed:
Nov. 22, 1999
Satoshi Utsugi, Tokyo, JP;
NEC Electronics Corporation, , JP;
Abstract
A semiconductor storage unit is provided with a memory cell array that is sectioned into a plurality of blocks, a redundant memory cell, and a redundant memory cell selection circuit for replacing a defective cell in the memory cell array with the redundant memory cell. The redundant memory cell selection circuit is provided with n-channel MOS transistors (N -N ) to whose gates a block selection signal (BLK) is input, p-channel MOS transistors (P -P ) to whose gates a block selection signal (BLKB) that is reverse in logical value to the block selection signal (BLK) is input, and fuses (F -F ) that are connected between the sources or drains of the transistors (N -N ) and those of the transistors (P -P ), respectively. Thereby, it is possible to reduce the number of fuses and the size of a chip.