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. 05, 2010
Filed:
Mar. 05, 2007
Naoto Matono, Nagano, JP;
Noriaki Kasahara, Tokyo, JP;
Shin Narushima, Tokyo, JP;
Takamitsu Sakamoto, Tokyo, JP;
Koichi Otani, Tokyo, JP;
Naoto Matono, Nagano, JP;
Noriaki Kasahara, Tokyo, JP;
Shin Narushima, Tokyo, JP;
Takamitsu Sakamoto, Tokyo, JP;
Koichi Otani, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Sae Magnetics (H.K.) Ltd., Hong Kong, CN;
Abstract
A perpendicular magnetic write head includes an auxiliary magnetic pole layer disposed on a trailing or leading side of a main magnetic pole layer, the auxiliary magnetic pole layer being recessed from the main magnetic pole layer. A nonmagnetic layer is disposed in a layer same as the auxiliary magnetic pole layer and in front of the auxiliary magnetic pole layer, the nonmagnetic layer having an internal stress of a direction same as that of the main magnetic pole layer, and a write shield layer is disposed in a layer same as the auxiliary magnetic pole layer and in front of the auxiliary magnetic pole layer, the write shield layer being separated from the main magnetic pole layer with a gap layer in between. The nonmagnetic layer is arranged to fill up a space between the auxiliary magnetic pole layer and the write shield layer.