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:
Nov. 09, 2021
Filed:
Dec. 30, 2019
Western Digital Technologies, Inc., San Jose, CA (US);
Chih-Ching Hu, Pleasanton, CA (US);
Yung-Hung Wang, San Jose, CA (US);
Yuankai Zheng, Fremont, CA (US);
Chen-jung Chien, Mountain View, CA (US);
Ming Mao, Dublin, CA (US);
Daniele Mauri, San Jose, CA (US);
Ming Jiang, San Jose, CA (US);
WESTERN DIGITAL TECHNOLOGIES, INC., San Jose, CA (US);
Abstract
The present disclosure generally relates to a Wheatstone bridge that includes a plurality of resistors comprising dual free layer (DFL) TMR structures. The DFL TMR structures include one or more hard bias structures on the side of DLF. Additionally, one or more soft bias structures may also be present on a side of the DFL. Two resistors will have identical hard bias material while two other resistors will have hard bias material that is identical to each other, yet different when compared to the first two resistors. The hard bias materials will provide opposite magnetizations that will provide opposite bias fields that result in two different magnetoresistance responses for the DFL TMR.