Invention Grant
- Patent Title: Layered synthetic anti-ferromagnetic upper shield
- Patent Title (中): 分层合成反铁磁上护罩
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Application No.: US14067456Application Date: 2013-10-30
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Publication No.: US09087525B2Publication Date: 2015-07-21
- Inventor: Zhengqi Lu , Daniel Hassett , Paula McElhinney , Jiansheng Xu
- Applicant: Seagate Technology LLC
- Applicant Address: US CA Cupertino
- Assignee: SEAGATE TECHNOLOGY LLC
- Current Assignee: SEAGATE TECHNOLOGY LLC
- Current Assignee Address: US CA Cupertino
- Agency: HolzerIPLaw, PC
- Main IPC: G11B5/11
- IPC: G11B5/11 ; G11B5/33

Abstract:
A magneto-resistive (MR) sensor may include a variety of individual functional layers whereby an electrical resistance throughout the layers of the sensor stack varies according to the polarity of a pinned layer within the sensor stack. A layered synthetic anti-ferromagnetic (SAF) upper shield of the MR sensor includes an upper SAF layer and a lower SAF layer separated by a shield anti-ferromagnetic (AFM) layer. The lower SAF layer is in contact with a side shield of the MR sensor, which provides a side shield biasing field to the MR sensor. The upper SAF layer separates the lower SAF layer from a top shield and/or domain control structure (DCS) magnet(s) of the MR sensor and shields the lower SAF layer and the sensor stack from DCS stray field(s), thereby reducing noise.
Public/Granted literature
- US20150116868A1 LAYERED SYNTHETIC ANTI-FERROMAGNETIC UPPER SHIELD Public/Granted day:2015-04-30
Information query
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