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. 08, 2013
Filed:
Dec. 15, 2009
Kazue Kudo, Kanagawa-ken, JP;
Hiromi Shiina, Ibaraki-ken, JP;
Yohji Maruyama, Saitama-ken, JP;
Tetsuya Okai, Kanagawa-ken, JP;
Gen Oikawa, Kanagawa-ken, JP;
Shouji Tokutake, Kanagawa-ken, JP;
Kazue Kudo, Kanagawa-ken, JP;
Hiromi Shiina, Ibaraki-ken, JP;
Yohji Maruyama, Saitama-ken, JP;
Tetsuya Okai, Kanagawa-ken, JP;
Gen Oikawa, Kanagawa-ken, JP;
Shouji Tokutake, Kanagawa-ken, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A perpendicular magnetic recording head according to one embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the depths of the first magnetic films from an air bearing surface are smaller than the depth of the second magnetic film from the air bearing surface at least at a periphery of the main pole. A perpendicular magnetic recording head according to another embodiment includes a main pole; first magnetic films arranged on both sides of the main pole in a track width direction via nonmagnetic films; and a second magnetic film arranged on a trailing side of the main pole via a nonmagnetic film; wherein the main pole and the first magnetic films have respective tapered portions whose thicknesses become larger toward the side opposite to an air bearing surface, and the tapered portions are in contact with the second magnetic film. Additional embodiments are also presented.