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:
Aug. 17, 2004
Filed:
Jan. 16, 2002
Kenichi Kawai, Kawasaki, JP;
Mitsumasa Okada, Kawasaki, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
In the thin film magnetic head of the present invention, angle of an end face of a heaped layer with respect to a lower magnetic pole layer is made obtuse so as to prevent flux leakage at a rear part of the heaped layer and improve writing characteristics of the magnetic head. The thin film magnetic head comprises: a lower magnetic pole layer; a gap layer provided on the lower magnetic pole layer; a sub-magnetic pole layer provided on the gap layer; an upper magnetic pole layer connected to a rear part of the sub-magnetic pole layer; and a heaped layer made of an electrically insulating material and provided on the rear side of the gap layer and between the lower magnetic pole layer and the sub-magnetic pole layer, the heaped layer having a slope portion, which is extended toward the gap layer and whose height is gradually reduced toward the same.