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. 12, 2010
Filed:
Mar. 08, 2006
Yoji Maruyama, Saitama, JP;
Hideki Zaitsu, Kanagawa, JP;
Ichiro Ohdake, Kanagawa, JP;
Kazue Kudo, Kanagawa, JP;
Masafumi Mochizuki, Tokyo, JP;
Yoji Maruyama, Saitama, JP;
Hideki Zaitsu, Kanagawa, JP;
Ichiro Ohdake, Kanagawa, JP;
Kazue Kudo, Kanagawa, JP;
Masafumi Mochizuki, Tokyo, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
Embodiments of the invention provide a perpendicular magnetic head with a narrow track and excellent high frequency characteristics. In one embodiment, a recording magnetic head includes coil conductors and magnetic pole pieces putting the same therebetween, in which a main magnetic pole piece is formed into a planar structure and a magnetic film connected with the main magnetic pole piece in a magnetic coupling relation is curved in the direction of the film thickness. Further, a shield material disposed near the main magnetic pole piece is made of a material of higher resistance than that of the material for the read shield.