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. 20, 2001
Filed:
May. 24, 2000
Hirokazu Miyazaki, Tokyo, JP;
Katsuaki Matsui, Tokyo, JP;
Oki Electric Industry Co., Ltd., Tokyo, JP;
Abstract
The present invention provides a semiconductor memory capable of achieving redundancy relief for column line failure in a stable manner while realizing greater capacity and higher integration. A column decoder circuit CD,provided in the semiconductor memory is provided with fuse blocks FB(,)˜FB(,), first decoders DA(,)˜DA(,), redundancy control circuits RL(,)˜RL(,) and RLr, second decoders DB(,)˜DB(,), DBr(,) and DBr(,) and column line drivers DV,(,)˜DV,(,), DV,r(,) and DV,r(,). A redundancy control circuit RL(k) is connected with a column line driver DV,(,k) that drives a column line CL(,k) and a column line driver DV,(,k+1) that drives a column line CL(,k+1) via second decoders DB(,k) and DB,(,k+1) respectively.