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. 09, 2006
Filed:
Sep. 18, 2003
Shigekazu Ohtomo, Fujisawa, JP;
Hiroshi Fukui, Fujisawa, JP;
Nobuo Yoshida, Fujisawa, JP;
Hitachi Global Storage Technologies Japan, Ltd., Odawara, JP;
Abstract
A protrusionhaving a width Lpfw equal to or somewhat larger than a track width Tw and protruding to the air bearing surface is provided on a lower magnetic poleor lower magnetic pole front end layer. The lower magnetic poleor the lower magnetic pole front end layerother than the protrusion is retracted by Lpfd from the air bearing surface. With the constitution, since the upper end surfaceof the lower magnetic poleor the lower magnetic pole to end layerthat generates the leakage magnetic fields in the off-track portions is not exposed to the air bearing surface, the leakage magnetic fields Hxz in the off-track portions can be decreased greatly.