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:
Jun. 23, 2009
Filed:
Jul. 24, 2006
Yoji Maruyama, Saitama, JP;
Kazue Kudo, Kanagawa, JP;
Ichiro Ohdake, Kanagawa, JP;
Tadayuki Iwakura, Kanagawa, JP;
Yoji Maruyama, Saitama, JP;
Kazue Kudo, Kanagawa, JP;
Ichiro Ohdake, Kanagawa, JP;
Tadayuki Iwakura, Kanagawa, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A magnetic head with a narrow track width angle and of excellent mass productivity is provided for attaining a large capacity magnetic disk drive. In an embodiment, a perpendicular recording magnetic head includes: a first non-magnetic film and a first soft magnetic film stacked on the trailing side of a main magnetic pole piece for constituting a gap film; a second non-magnetic layer in contact with the end face of the first non-magnetic layer on both sides of the main magnetic pole piece; a third soft magnetic film in contact with the second non-magnetic layer on both sides of the main magnetic pole piece; and a second soft magnetic film in contact with the first soft magnetic film and the third soft magnetic film on the trailing side of the main magnetic pole.