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. 24, 2011
Filed:
Jun. 04, 2007
Naoto Matono, Hong Kong, CN;
Koichi Otani, Tokyo, JP;
Tatsuya Harada, Tokyo, JP;
Noriaki Kasahara, Tokyo, JP;
Takamitsu Sakamoto, Tokyo, JP;
Hiroaki Kawashima, Tokyo, JP;
Hirotaka Gomi, Tokyo, JP;
Kenkichi Anagawa, Tokyo, JP;
Norikazu Ota, Tokyo, JP;
Naoto Matono, Hong Kong, CN;
Koichi Otani, Tokyo, JP;
Tatsuya Harada, Tokyo, JP;
Noriaki Kasahara, Tokyo, JP;
Takamitsu Sakamoto, Tokyo, JP;
Hiroaki Kawashima, Tokyo, JP;
Hirotaka Gomi, Tokyo, JP;
Kenkichi Anagawa, Tokyo, JP;
Norikazu Ota, Tokyo, JP;
SAE Magnetics (H.K.) Ltd., Hong Kong, CN;
TDK Corporation, Tokyo, JP;
Abstract
A magnetic head includes: a coil; a pole layer; a shield having an end face located in a medium facing surface forward of an end face of the pole layer along a direction of travel of a recording medium; a gap layer between the shield and the pole layer; and a substrate on which the foregoing elements are stacked. The top surface of the pole layer includes: first and second portions with a difference in height therebetween; and a third portion connecting the first and second portions to each other. The first portion has an edge located in the medium facing surface, and the second portion is located farther from the medium facing surface and from the substrate than the first portion. The magnetic head further includes a nonmagnetic layer disposed between the second portion and the gap layer. The nonmagnetic layer has a surface touching the second portion, the surface having an edge located at the boundary between the second and third portions. The nonmagnetic layer has a thickness equal to or greater than the difference in height between the first and second portions.