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. 27, 2009
Filed:
Oct. 17, 2005
Hiroshi Fukui, Ibaraki-ken, JP;
Yoji Maruyama, Saitama, JP;
Masafumi Mochizuki, Tokyo, JP;
Kaori Suzuki, Tokyo, JP;
Hiroshi Fukui, Ibaraki-ken, JP;
Yoji Maruyama, Saitama, JP;
Masafumi Mochizuki, Tokyo, JP;
Kaori Suzuki, Tokyo, JP;
Hitachi Global Storage Technologies Netherlands B.V., AZ Amsterdam, NL;
Abstract
Embodiments of the invention provide a magnetic head which prevents data on a recording medium from being erased even when a stray field is applied. In one embodiment, a magnetic head includes a perpendicular write head having a main pole and an auxiliary pole; and a read head having a lower shield, an upper shield and a magneto-resistive element formed between the lower shield and the upper shield. At least one of the auxiliary pole, lower shield and upper shield has a recessed portion, whose height in an element height direction is lower than the height of edges thereof in a track width direction, on a surface opposite to the air bearing surface.