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:
Jun. 26, 2012
Filed:
Nov. 12, 2009
Kazumasa Nishimura, Niigata-ken, JP;
Hidekazu Kobayashi, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Yosuke Ide, Niigata-ken, JP;
Ryo Nakabayashi, Niigata-ken, JP;
Yoshihiro Nishiyama, Niigata-ken, JP;
Akio Hanada, Niigata-ken, JP;
Naoya Hasegawa, Niigata-ken, JP;
Kazumasa Nishimura, Niigata-ken, JP;
Hidekazu Kobayashi, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Yosuke Ide, Niigata-ken, JP;
Ryo Nakabayashi, Niigata-ken, JP;
Yoshihiro Nishiyama, Niigata-ken, JP;
Akio Hanada, Niigata-ken, JP;
Naoya Hasegawa, Niigata-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A tunneling magnetic sensing element includes a laminate in which a pinned magnetic layer having a magnetization direction pinned, an insulating barrier layer, and a free magnetic layer having a magnetization direction variable with an external magnetic field are laminated in order from below. The insulating barrier layer is made of Mg—O. The free magnetic layer has a soft magnetic layer and an enhanced layer disposed between the soft magnetic layer and the insulating barrier layer to have a spin polarization ratio higher than the soft magnetic layer. An insertion magnetic layer made of one selected from Co—Fe—B, Co—B, Fe—B, and Co—Fe is inserted into the soft magnetic layer in a direction parallel to the interface of each layer constituting the laminate, and the soft magnetic layer is divided into multiple layers in a thickness direction through the insertion magnetic layer.