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. 09, 1997
Filed:
May. 10, 1995
Mao-Min Chen, San Jose, CA (US);
Robert Edward Fontana, San Jose, CA (US);
Mohamad Towfik Krounbi, San Jose, CA (US);
Kenneth Ting-Yuan Kung, San Jose, CA (US);
James Hsi-Tang Lee, San Jose, CA (US);
Jyh-Shiliey Jerry Lo, San Jose, CA (US);
Ching Hwa Tsang, Sunnyvale, CA (US);
Po-Kang Wang, San Jose, CA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A magnetoresistive (MR) read transducer having passive end regions separated by a central active region in which an MR layer is formed over substantially only the central active region and in which a magnetic bias layers is formed in each passive end region. Each of the magnetic bias layers includes a layer of ferromagnetic material and a layer of antiferromagnetic material overlaying and in contact with the ferromagnetic layer to provide an exchange-coupled magnetic bias field. Each of the magnetic bias layers form an abutting junction having magnetic and electrically continuity with the MR layer to produce a longitudinal magnetic bias field in the transducer.