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:
Dec. 09, 2014
Filed:
Sep. 30, 2011
Quang Le, San Jose, CA (US);
Simon H. Liao, Fremont, CA (US);
Shuxia Wang, San Jose, CA (US);
Guangli Liu, Pleasanton, CA (US);
Yongchul Ahn, San Jose, CA (US);
Quang Le, San Jose, CA (US);
Simon H. Liao, Fremont, CA (US);
Shuxia Wang, San Jose, CA (US);
Guangli Liu, Pleasanton, CA (US);
Yongchul Ahn, San Jose, CA (US);
HGST Netherlands B.V., Amsterdam, NL;
Abstract
A scissor style magnetic sensor having a novel hard bias structure for improved magnetic biasing robustness. The sensor includes a sensor stack that includes first and second magnetic layers separated by a non-magnetic layer such as an electrically insulating barrier layer or an electrically conductive spacer layer. The first and second magnetic layers have magnetizations that are antiparallel coupled, but that are canted in a direction that is neither parallel with nor perpendicular to the air bearing surface by a magnetic bias structure. The magnetic bias structure includes a neck portion extending from the back edge of the sensor stack and having first and second sides that are aligned with first and second sides of the sensor stack. The bias structure also includes a tapered or wedged portion extending backward from the neck portion.