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. 27, 2012
Filed:
Jun. 17, 2009
Hitoshi Iwasaki, Yokosuka, JP;
Kenichiro Yamada, Tokyo, JP;
Masayuki Takagishi, Tokyo, JP;
Tomomi Funayama, Tokyo, JP;
Masahiro Takashita, Yokohama, JP;
Mariko Shimizu, Yokohama, JP;
Soichi Oikawa, Tokyo, JP;
Katsuhiko Koui, Yokohama, JP;
Hitoshi Iwasaki, Yokosuka, JP;
Kenichiro Yamada, Tokyo, JP;
Masayuki Takagishi, Tokyo, JP;
Tomomi Funayama, Tokyo, JP;
Masahiro Takashita, Yokohama, JP;
Mariko Shimizu, Yokohama, JP;
Soichi Oikawa, Tokyo, JP;
Katsuhiko Koui, Yokohama, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
It is made possible to reduce the write magnetic field generated from the main magnetic pole toward the spin torque oscillator, so as to reduce the variation in the oscillation characteristics of the spin torque oscillator, and reduce the current required for oscillation. The magnetic head assembly includes: a recording magnetic pole; a spin torque oscillator that has first and second magnetic layers, and an intermediate layer interposed between the first and second magnetic layers, the spin torque oscillator generating a high-frequency magnetic field by applying a current between the first and second magnetic layers; and a third magnetic layer that is placed adjacent to at least part of a side face of the second magnetic layer.