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. 05, 2016
Filed:
Mar. 05, 2013
Headway Technologies, Inc., Milpitas, CA (US);
Kunliang Zhang, Fremont, CA (US);
Yewhee Chye, Hayward, CA (US);
Min Li, Fremont, CA (US);
Glen Garfunkel, San Jose, CA (US);
Headway Technologies, Inc., Milpitas, CA (US);
Abstract
A composite side shield structure is disclosed for providing biasing to a free layer in a sensor structure. The sensor is formed between a bottom shield and top shield each having a magnetization in a first direction that is parallel to an ABS. The side shield is stabilized by an antiferromagnetic (AFM) coupling scheme wherein a bottom (first) magnetic layer is AFM coupled to a second magnetic layer which in turn is AFM coupled to an uppermost (third) magnetic layer. First and third magnetic layers each have a magnetization aligned in the first direction and are coupled to bottom and top shields, respectively, for additional stabilization. The top shield may be modified to include an AFM scheme for providing additional stabilization and guidance to magnetic moments within AFM coupled magnetic layers in the top shield, and to the third magnetic layer in the side shield.