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:
Jan. 22, 2008
Filed:
Aug. 13, 2004
Taro Oike, Tokyo, JP;
Kiyoshi Noguchi, Tokyo, JP;
Shin Narushima, Tokyo, JP;
Takamitsu Sakamoto, Tokyo, JP;
Hiraku Hirabayashi, Tokyo, JP;
Taro Oike, Tokyo, JP;
Kiyoshi Noguchi, Tokyo, JP;
Shin Narushima, Tokyo, JP;
Takamitsu Sakamoto, Tokyo, JP;
Hiraku Hirabayashi, Tokyo, JP;
TDK Corporation, Tokyo, JP;
Abstract
A thin-film magnetic head includes a lower magnetic layer, an upper magnetic layer, a recording gap layer, and a thin-film coil. The lower magnetic layer has a first magnetic pole tip layer, and a first yoke layer which is connected to the first magnetic pole tip layer. The first yoke layer has an extended part which is relatively thick and a reduced part which is relatively thin in the area in which the first yoke layer confronts the first magnetic pole tip layer, the extended part being positioned on the side of the air bearing surface. Further, the first magnetic pole tip layer is connected to the first yoke layer at the extended part, and is insulated from the first yoke layer at the reduced part.