Invention Application
- Patent Title: Domain wall free shields of MR sensors
- Patent Title (中): MR传感器的域壁免费屏蔽
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Application No.: US10733545Application Date: 2003-12-11
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Publication No.: US20050128647A1Publication Date: 2005-06-16
- Inventor: Declan Macken
- Applicant: Declan Macken
- Applicant Address: US CA Scotts Valley
- Assignee: Seagate Technology LLC
- Current Assignee: Seagate Technology LLC
- Current Assignee Address: US CA Scotts Valley
- Main IPC: G11B5/127
- IPC: G11B5/127 ; G11B5/33 ; G11B5/596 ; G11B33/12

Abstract:
A magnetic reader of the present invention comprises an MR sensor shielded by a magnetic shield including single domain soft magnetic materials. The domain wall free magnetic shield includes an unbiased soft magnetic layer and a biased soft magnetic layer separated by a non-magnetic layer. The easy axis of the biased layer is oriented to create a path for magnetic flux through the biased and unbiased layers thereby reducing the demagnetization field of the shield. A biasing layer maintains the first and second magnetic layers as single domain magnets. The biasing layer is further shaped to define a quiet zone where the biasing layer does not overlay the MR sensor.
Public/Granted literature
- US07236333B2 Domain wall free shields of MR sensors Public/Granted day:2007-06-26
Information query
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