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. 18, 2011
Filed:
Dec. 18, 2008
Katsuya Miura, Sendai, JP;
Jun Hayakawa, Hino, JP;
Hiromasa Takahashi, Hachioji, JP;
Kenchi Ito, Kunitachi, JP;
Katsuya Miura, Sendai, JP;
Jun Hayakawa, Hino, JP;
Hiromasa Takahashi, Hachioji, JP;
Kenchi Ito, Kunitachi, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A memory for which writing is conducted by using a unidirectional write current. Currents which differ in current pulse width are applied to a magnetoresistance element in a film thickness direction of the magnetoresistance element consisting of a first ferromagnetic layer having a fixed magnetization direction, a second ferromagnetic layer having a variable magnetization direction, a third ferromagnetic layer having a variable magnetization direction, a first non-magnetic layer located between the first ferromagnetic layer and the second ferromagnetic layer, and a second non-magnetic layer located between the second ferromagnetic layer and the third ferromagnetic layer, to reverse a magnetization direction of either the second ferromagnetic layer or the third ferromagnetic layer by using a spin-transfer torque.