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:
Aug. 13, 2013
Filed:
May. 27, 2009
Applicants:
Takaharu Tsuji, Kawasaki, JP;
Genta Watanabe, Kawasaki, JP;
Inventors:
Takaharu Tsuji, Kawasaki, JP;
Genta Watanabe, Kawasaki, JP;
Assignee:
Renesas Electronics Corporation, Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G11C 11/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A write disturbance margin of reference cells that generate reference current during read is improved. A bit line forms a clad interconnect structure in the normal cell region where normal cells are disposed, and a partially clad or non-clad interconnect structure in the reference cell region where a reference cell is disposed. Thus, a writing magnetic field intensity applied to the reference cell is smaller than the write magnetic field intensity applied to a normal memory cell during identical write currents.