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:
Jan. 10, 2012
Filed:
Mar. 10, 2010
Tetsuya Roppongi, Tokyo, JP;
Takuya Adachi, Tokyo, JP;
Isamu Sato, Tokyo, JP;
Hiroshi Ikeda, Tokyo, JP;
Mikio Matsuzaki, Tokyo, JP;
Tetsuya Roppongi, Tokyo, JP;
Takuya Adachi, Tokyo, JP;
Isamu Sato, Tokyo, JP;
Hiroshi Ikeda, Tokyo, JP;
Mikio Matsuzaki, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A magnetic recording apparatus includes a magnetic recording medium having a magnetic recording layer, a thin-film magnetic head with a microwave-band magnetic drive function, the head having a write field generation means that generates a write field to the magnetic recording medium in response to a write signal, and a microwave generator that is provided independent of the write field generation means and generates an alternating magnetic field in plane having a microwave-band frequency when microwave-excitation current is fed, an excitation current generation means that generates the microwave-excitation current by amplitude-modulating microwave carrier current with a modulating signal having a fixed period, and a write signal supply means that generates the write signal and applies it to the write field generation means of the thin-film magnetic head.