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:
Jun. 24, 2014
Filed:
Apr. 21, 2009
Masukazu Igarashi, Kawagoe, JP;
Harukazu Miyamoto, Higashimurayama, JP;
Masukazu Igarashi, Kawagoe, JP;
Harukazu Miyamoto, Higashimurayama, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
With respect to microwave assisted magnetic recording, high-density information recording is performed by forming a favorable write magnetic domain on a recording medium. The recording medium is placed in a magnetically resonant state by generating a microwave, and information is recorded. A recording mediumcomprises partsandwith differing magnetic anisotropy fields. Recording is performed using, for the frequency of the microwave, a frequency that places the part, which has smaller magnetic anisotropy, in a resonant state. Recording density of an information recording apparatus can be increased, while at the same time also improving reliability. Consequently, it becomes possible to reduce costs.