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. 17, 2006
Filed:
Nov. 07, 2002
Yoshihide Bando, Kawasaki, JP;
Yoshimasa Yagishita, Kawasaki, JP;
Yoshihide Bando, Kawasaki, JP;
Yoshimasa Yagishita, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A memory cell array is partitioned into a plurality of memory regions each of which includes a plurality of sense amplifiers and each of which is established as a unit of data input/output. Dummy regions each are formed between every two memory regions and include dummy bit lines that are set to a predetermined voltage at least during the operation of the memory cell array. Since the dummy bit lines are wired between the bit lines of the two adjacent memory regions, the voltage change in the bit lines in any of the memory regions can be prevented from affecting the bit lines in the other memory regions. As a result, malfunction of semiconductor memories can be prevented.