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:
Mar. 06, 2012
Filed:
May. 09, 2008
Kazumasa Nishimura, Tokyo, JP;
Masamichi Saito, Tokyo, JP;
Yoshihiro Nishiyama, Tokyo, JP;
Hidekazu Kobayashi, Tokyo, JP;
Naoya Hasegawa, Tokyo, JP;
Kazumasa Nishimura, Tokyo, JP;
Masamichi Saito, Tokyo, JP;
Yoshihiro Nishiyama, Tokyo, JP;
Hidekazu Kobayashi, Tokyo, JP;
Naoya Hasegawa, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A tunneling magnetic sensing element includes: a pinned magnetic layer whose direction of magnetization is pinned in one direction; an insulating barrier layer; and a free magnetic layer whose direction of magnetization changes in response to an external magnetic field. The pinned magnetic layer, the insulating barrier layer and the free magnetic layer are deposited in the named order. A first protective layer composed of a platinum-group element is disposed on the free magnetic layer, and a second protective layer composed of Ti is disposed on the first protective layer.