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:
Jul. 19, 2005
Filed:
Jul. 30, 2004
Applicant:
Akinori Shibayama, Muko, JP;
Inventor:
Akinori Shibayama, Muko, JP;
Assignee:
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C007/00 ;
U.S. Cl.
CPC ...
Abstract
A semiconductor memory device according to the present invention includes: a plurality of N-ch MOS transistors arranged in an area surrounding a plurality of memory cells arranged in an array, at a spacing depending on a spacing of the plurality of memory cells, for driving the plurality of memory cells; and a plurality of dummy transistors-each of which is formed between two adjacent ones of the plurality of N-ch MOS transistors-so as to share diffusion layers with adjacent N-ch MOS transistorsand each of which has a gate electrode supplied with a voltage for electrically insulating these adjacent transistors-