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:
Sep. 28, 2004
Filed:
Mar. 14, 2002
Mark W. Covington, Pittsburgh, PA (US);
Thomas M. Crawford, Pittsburgh, PA (US);
Seagate Technology LLC, Scotts Valley, CA (US);
Abstract
A magnetization sensor for sensing write field characteristic of a perpendicular or longitudinal recording head such as may be used with a disc drive, and a method of manufacture therefor are disclosed. The sensor can be manufactured concurrently with the write head and incorporated therein. The magnetization sensor comprises a non-magnetic layer separating a hard magnetic layer and a soft magnetic layer, with electrical leads to provide a biasing and sensing current. The magnetization sensor can be either a giant magnetoresistive element or a tunneling magnetoresistive element, depending upon the non-magnetic layer used in the construction of the device.