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:
Jul. 19, 2011
Filed:
Jul. 20, 2007
Yusuke Toma, Niigata-ken, JP;
Hiroshi Kameda, Niigata-ken, JP;
Kiyoshi Kobayashi, Niigata-ken, JP;
Toru Takahashi, Niigata-ken, JP;
Sumihito Morita, Niigata-ken, JP;
Yusuke Toma, Niigata-ken, JP;
Hiroshi Kameda, Niigata-ken, JP;
Kiyoshi Kobayashi, Niigata-ken, JP;
Toru Takahashi, Niigata-ken, JP;
Sumihito Morita, Niigata-ken, JP;
TDK Corporation, Tokyo, JP;
Abstract
A perpendicular magnetic recording head according to the present invention is composed of a first magnetic layer having a main magnetic pole exposed at a facing surface opposite a recording medium, a second magnetic layer adjacent to the first magnetic layer with an intermediary non-magnetic layer disposed therebetween, and a coil layer for applying a recording magnetic field to the first magnetic layer. Since the second magnetic layer has a shape including a substantially arched portion in its cross section along a height direction, it becomes possible to keep an Edge Write magnetic field in a low level and improve external magnetic field resistance.