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:
Sep. 24, 2013
Filed:
Jun. 30, 2010
Yohji Maruyama, Iruma, JP;
Tadayuki Iwakura, Odawara, JP;
Tetsuya Okai, Hadano, JP;
Hiromi Shiina, Hitachi, JP;
Kazue Kudo, Odawara, JP;
Yohji Maruyama, Iruma, JP;
Tadayuki Iwakura, Odawara, JP;
Tetsuya Okai, Hadano, JP;
Hiromi Shiina, Hitachi, JP;
Kazue Kudo, Odawara, JP;
HGST Netherlands B.V., Amsterdam, NL;
Abstract
According to one embodiment, a perpendicular magnetic recording head includes a main magnetic pole having a trailing side and two lateral sides, a magnetic shield near the trailing side and both lateral sides of the main magnetic pole, the magnetic shield comprising: a first soft magnetic film with a relatively high saturation flux density positioned facing depthwise from a floating surface side thereof, a second soft magnetic film with a relatively low saturation flux density, and a first non-magnetic film. The head also includes a non-magnetic film interposed between the magnetic shield and the main magnetic pole, a first magnetic film magnetically coupled to the magnetic shield and the main magnetic pole on a side opposite a floating surface side thereof, and a coil surrounding a magnetic circuit, the magnetic circuit comprising the main magnetic pole and the first magnetic film. Other systems and methods are also described.