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. 20, 2015
Filed:
Jun. 07, 2013
Applicant:
Hitachi, Ltd., Tokyo, JP;
Inventors:
Katsuro Watanabe, Hitachiota, JP;
Masukazu Igarashi, Kawagoe, JP;
Assignee:
Hitachi, Ltd., Tokyo, JP;
Primary Examiner:
Int. Cl.
CPC ...
G11B 5/31 (2006.01); G11B 5/147 (2006.01); G11B 5/23 (2006.01); G11B 5/00 (2006.01);
U.S. Cl.
CPC ...
G11B 5/147 (2013.01); G11B 5/314 (2013.01); G11B 5/3146 (2013.01); G11B 5/315 (2013.01); G11B 2005/0024 (2013.01);
Abstract
To suppress a spread of not only a recording magnetic field generated from a main pole but also a high-frequency magnetic field generated from a spin torque oscillator in a microwave assisted magnetic recording head. The main pole and the spin torque oscillator are surrounded by a trailing shield layer and are also surrounded by a side/leading shield layer with an insulator sidegap layer interposed therebetween, and a high-frequency magnetic field shield layer, which absorbs a high-frequency magnetic field generated from the spin torque oscillator, is arranged in at least part of the shield layers.