Invention Grant
US07054117B2 Method of making a read head having a tunnel junction sensor with a free layer biased by exchange coupling with insulating antiferromagnetic (AFM) layers
失效
制造具有通过与绝缘反铁磁（AFM）层的交换耦合偏置的自由层的隧道结传感器的读取头的方法
- Patent Title: Method of making a read head having a tunnel junction sensor with a free layer biased by exchange coupling with insulating antiferromagnetic (AFM) layers
- Patent Title (中): 制造具有通过与绝缘反铁磁（AFM）层的交换耦合偏置的自由层的隧道结传感器的读取头的方法
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Application No.: US10826945Application Date: 2004-04-17
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Publication No.: US07054117B2Publication Date: 2006-05-30
- Inventor: Kuok San Ho , Tao Pan
- Applicant: Kuok San Ho , Tao Pan
- Applicant Address: US NY Armonk
- Assignee: International Business Machines Corporation
- Current Assignee: International Business Machines Corporation
- Current Assignee Address: US NY Armonk
- Agent Ervin F. Johnston
- Main IPC: G11B5/127
- IPC: G11B5/127 ; G11B5/39 ; H04R31/00
Abstract:
Longitudinal biasing of a free layer in a current perpendicular to the planes of the layers (CPP) type of sensor in a read head is implemented by pinning magnetic moments of first and second side portions of the free layer beyond the track width of the read head with first and second insulating antiferromagnetic (AFM) layers which are exchange coupled thereto. The pinning of the magnetic moments of the first and second side portions of the free layer pin and longitudinally bias the central active portion of the free layer within the track width so that the central portion of the free layer is magnetically stable.
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