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:
Sep. 13, 2011
Filed:
Nov. 29, 2007
Yusuke Toma, Niigata-ken, JP;
Hiroshi Kameda, Niigata-ken, JP;
Kiyoshi Kobayashi, Niigata-ken, JP;
Toru Takahashi, Niigata-ken, JP;
Yusuke Toma, Niigata-ken, JP;
Hiroshi Kameda, Niigata-ken, JP;
Kiyoshi Kobayashi, Niigata-ken, JP;
Toru Takahashi, Niigata-ken, JP;
TDK Corporation, Tokyo, JP;
Abstract
A vertical magnetic recording head device includes: a magnetic layer that includes a main magnetic pole exposed from a surface facing a recording medium; a return yoke layer that is provided on the magnetic layer with a non-magnetic layer interposed therebetween; and coil layers that apply a recording magnetic field to the magnetic layer and the return yoke layer. In the vertical magnetic recording head device, the return yoke layer includes thick portions that extend in a height direction in edge regions arranged in a track width direction.