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:
Feb. 01, 2011
Filed:
Sep. 05, 2007
Hardayal Singh Gill, Palo Alto, CA (US);
Wipul Pemsiri Jayasekara, Los Gatos, CA (US);
Hardayal Singh Gill, Palo Alto, CA (US);
Wipul Pemsiri Jayasekara, Los Gatos, CA (US);
Hitachi Global Storage Technologies Netherlands B.V., Amsterdam, NL;
Abstract
A differential giant magnetoresistive sensor for sensing a magnetic signal. The differential sensor has a structure configured to minimize spin torque noise. The differential magnetoresistive sensor includes first and second magnetoresistive sensor elements and a three lead structure including an inner lead sandwiched between the first and second sensor elements and first and second outer leads. each of the sensor elements includes an antiparallel coupled free layer structure with the free layer of each of the sensor elements preferably being positioned near the inner lead. The three lead structure allows sense current to be supplied to the sensor such that electrons travel first through the free layer of each sensor element and then through the pinned layer structure.