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. 06, 2009
Filed:
Jan. 18, 2007
Toru Takahashi, Niigata-ken, JP;
Hisayuki Yazawa, Niigata-ken, JP;
Hideki Gochou, Niigata-ken, JP;
Kiyoshi Kobayashi, Niigata-ken, JP;
Minoru Yamada, Niigata-ken, JP;
Kiyoshi Sato, Niigata-ken, JP;
Toshinori Watanabe, Niigata-ken, JP;
Toru Takahashi, Niigata-ken, JP;
Hisayuki Yazawa, Niigata-ken, JP;
Hideki Gochou, Niigata-ken, JP;
Kiyoshi Kobayashi, Niigata-ken, JP;
Minoru Yamada, Niigata-ken, JP;
Kiyoshi Sato, Niigata-ken, JP;
Toshinori Watanabe, Niigata-ken, JP;
TDK Corporation, Tokyo, JP;
Abstract
A main magnetic pore layer is formed on an insulating layer flattened into a high-flatness surface, and a yoke layer having a large film thickness is formed under the main magnetic pole layer independently of the main magnetic pole. The main magnetic pole layer has a front end surface formed in a shape with a width size gradually increasing in a direction of track width as the front end surface departs farther away from an auxiliary magnetic pole layer. A perpendicular magnetic recording head can be provided which can suppress the occurrence of fringing in a recording pattern, and can form the main magnetic pole layer with high pattern accuracy, and can satisfactorily introduce a recording magnetic field to a fore end of the main magnetic pole layer.