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:
Feb. 17, 2009
Filed:
Nov. 22, 2006
Applicants:
Homare Sato, Tokyo, JP;
Kiyoshi Nakai, Tokyo, JP;
Inventors:
Homare Sato, Tokyo, JP;
Kiyoshi Nakai, Tokyo, JP;
Assignee:
Elpida Memory Inc., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G11C 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A semiconductor memory device includes a plurality of active regions, and a gate electrode in a fish bone shape arranged on each active region. In each active region, a plurality of source regions and a plurality of drain regions are arranged in a matrix manner. The source regions are commonly connected to a source line, and the drain regions are each connected to a lower electrode of a different memory element. According to the present invention, it is possible to assign three cell transistors connected in parallel to one memory element, so that an effective gate width is further increased.