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:
May. 29, 2012
Filed:
Apr. 28, 2011
Yasuhiro Wakabayashi, Hiratsuka, JP;
Kazue Kudo, Odawara, JP;
Shouji Tokutake, Odawara, JP;
Hiromi Shiina, Hitachi, JP;
Yohji Maruyama, Iruma, JP;
Yasuhiro Wakabayashi, Hiratsuka, JP;
Kazue Kudo, Odawara, JP;
Shouji Tokutake, Odawara, JP;
Hiromi Shiina, Hitachi, JP;
Yohji Maruyama, Iruma, JP;
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
According to one embodiment, a perpendicular magnetic recording head includes a shield having a groove and a main magnetic pole positioned in the groove of the shield. The groove includes a bottom side near a leading edge of the shield and inclined sides extending from the bottom side toward a trailing edge of the shield and from an ABS side of the head to a recessed side of the shield opposite the ABS. The shield is coupled to a non-magnetic layer at the recessed side, a cross-sectional area of the groove is less at a position nearer to the substrate than a position farther from the substrate, a cross-sectional area of the groove is less at a position nearer to the ABS side of the shield than a position farther from the ABS side of the shield, and a portion of the sides of the groove have curved surfaces.