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:
Aug. 16, 2011
Filed:
Dec. 13, 2007
Hidetaka Kawano, Tokyo, JP;
Hiromichi Umehara, Tokyo, JP;
Takamitsu Sakamoto, Tokyo, JP;
Koichi Otani, Tokyo, JP;
Noriaki Kasahara, Tokyo, JP;
Naoto Matono, Saku, JP;
Hidetaka Kawano, Tokyo, JP;
Hiromichi Umehara, Tokyo, JP;
Takamitsu Sakamoto, Tokyo, JP;
Koichi Otani, Tokyo, JP;
Noriaki Kasahara, Tokyo, JP;
Naoto Matono, Saku, JP;
TDK Corporation, Tokyo, JP;
SAE Magnetics (H.K.) Ltd., Hong Kong, HK;
Abstract
A perpendicular recording thin-film magnetic head comprises a main magnetic pole having a tip main magnetic pole part extending in a height direction from a medium-opposing surface and a base main magnetic pole part connected to the tip main magnetic pole part on a side opposite from the medium-opposing surface side and wider than the tip main magnetic pole part in a track width direction; a return yoke extending in the height direction from the medium-opposing surface and magnetically coupling with the base main magnetic pole part at a position distanced from the medium-opposing surface in the height direction, while opposing the tip main magnetic pole part through a write gap layer in a bit length direction in the medium-opposing surface; and a main magnetic pole adjacent magnetic shield layer extending along at least part of side faces of the main magnetic pole other than the medium-opposing surface as seen in a laminating direction, while holding a nonmagnetic layer between the main magnetic pole and the main magnetic pole adjacent magnetic shield layer.