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:
Apr. 06, 2010
Filed:
Jul. 28, 2006
Hiroshi Kameda, Niigata-ken, JP;
Hisayuki Yazawa, Niigata-ken, JP;
Hiroshi Kameda, Niigata-ken, JP;
Hisayuki Yazawa, Niigata-ken, JP;
TDK Corporation, Tokyo, JP;
Abstract
A perpendicular magnetic recording head includes a main pole layer and a return path layer that are exposed from a medium-facing surface of the recording head facing a recording medium and that face each other with a predetermined gap therebetween at the medium-facing surface. A coil layer applies a recording magnetic field to the main pole layer and the return path layer. The return path layer includes a gap adjusting layer and a main layer stacked in that order from a side facing the main pole layer. The gap adjusting layer is positioned so as to face the main pole layer and the recording medium, and is made of a magnetic material having a resistivity lower than resistivities of the main layer and the main pole layer.