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:
Nov. 25, 2014
Filed:
Mar. 29, 2013
Tdk Corporation, Tokyo, JP;
Shohei Kawasaki, Tokyo, JP;
Shuji Okame, Tokyo, JP;
Takayasu Kanaya, Tokyo, JP;
Satoshi Miura, Tokyo, JP;
Kenzo Makino, Tokyo, JP;
Takumi Yanagisawa, Tokyo, JP;
Takahiko Machita, Tokyo, JP;
Masashi Sano, Tokyo, JP;
Hideyuki Ukita, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A thin film magnetic head includes a spin valve film that includes a magnetization free layer, a magnetization pinned layer and a non-magnetic spacer layer that is disposed between the magnetization free and pinned layers, and a pair of side layers that are disposed at both sides of the spin valve film in a track width direction and at least in the vicinity of the magnetization free layer and the magnetization pinned layer. Each of the side layers has a bias magnetic field application layer that includes a soft magnetic layer and applies a bias magnetic field in the track width direction to the magnetization free layer, and a gap layer that is positioned between the spin valve film and the bias magnetic field application layer, and the side layers have compression stresses at least in the vicinity of the magnetization pinned layer.