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:
Oct. 29, 2013
Filed:
Jun. 24, 2011
Yusuke Takahashi, Odawara, JP;
Hiromi Shiina, Hitachi, JP;
Kazue Kudo, Odawara, JP;
Yohji Maruyama, Iruma, JP;
Kaori Suzuki, Kanagawa, JP;
Yusuke Takahashi, Odawara, JP;
Hiromi Shiina, Hitachi, JP;
Kazue Kudo, Odawara, JP;
Yohji Maruyama, Iruma, JP;
Kaori Suzuki, Kanagawa, JP;
HGST Netherlands B.V., Amsterdam, NL;
Abstract
In one embodiment, a perpendicular magnetic head includes a main magnetic pole, a side shield disposed on both sides of the main magnetic pole in a track width direction, the side shield including a material having a saturation magnetic flux density of no greater than about 1.0 T, and a trailing shield disposed on a trailing side of the main magnetic pole, wherein the trailing shield and the side shield are physically separated from one another. In another embodiment, the side shield includes a first magnetic film, and the trailing shield includes a second magnetic film, wherein a magnetic permeability of the first magnetic film is lower than a magnetic permeability of the second magnetic film.