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:
Sep. 21, 2010
Filed:
Aug. 27, 2009
Masamichi Saito, Niigata-ken, JP;
Yoshihiro Nishiyama, Niigata-ken, JP;
Yosuke Ide, Niigata-ken, JP;
Eiji Umetsu, Niigata-ken, JP;
Naoya Hasegawa, Niigata-ken, JP;
Yasuo Hayakawa, Niigata-ken, JP;
Masamichi Saito, Niigata-ken, JP;
Yoshihiro Nishiyama, Niigata-ken, JP;
Yosuke Ide, Niigata-ken, JP;
Eiji Umetsu, Niigata-ken, JP;
Naoya Hasegawa, Niigata-ken, JP;
Yasuo Hayakawa, Niigata-ken, JP;
TDK Corporation, Tokyo, JP;
Abstract
A CPP giant magnetoresistive head includes lower and upper shield layers, and a giant magnetoresistive element disposed between the upper and lower shield layers and including a pinned magnetic layer, a free magnetic layer and a nonmagnetic layer disposed between the pinned magnetic layer and the free magnetic layer. In the CPP giant magnetoresistive head, the pinned magnetic layer extends to the rear of the nonmagnetic layer and the free magnetic layer in the height direction, and the dimension of the pinned magnetic layer in the height direction is larger than that in the track width direction. Also, the pinned magnetic layer comprises a magnetic material having a positive magnetostriction constant or a magnetic material having high coercive force, and the end of the pinned magnetic layer is exposed at a surface facing a recording medium.