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:
Apr. 05, 2011
Filed:
Oct. 09, 2007
Isamu Sato, Tokyo, JP;
Tetsuya Roppongi, Tokyo, JP;
Yuichi Watabe, Tokyo, JP;
Norikazu Ota, Tokyo, JP;
Hiroshi Ikeda, Tokyo, JP;
Mikio Matsuzaki, Tokyo, JP;
Isamu Sato, Tokyo, JP;
Tetsuya Roppongi, Tokyo, JP;
Yuichi Watabe, Tokyo, JP;
Norikazu Ota, Tokyo, JP;
Hiroshi Ikeda, Tokyo, JP;
Mikio Matsuzaki, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
Provided is a thin-film magnetic head capable of writing data with high accuracy on a magnetic recording medium having high coercive force without heating. The head comprises an electromagnetic coil element comprising: a main magnetic pole; an auxiliary magnetic pole; and a write coil formed so as to pass through at least between the main magnetic pole and the auxiliary magnetic pole, for generating the write magnetic field. In this head, a part of the write coil has a layered structure of: a resonance coil layer for generating a resonance magnetic field having ferromagnetic resonance frequency of a magnetic recording layer of a magnetic recording medium or having a frequency in the vicinity thereof; and a write coil layer. And further, the resonance coil layer and the write coil layer sandwich an insulating layer therebetween.