Invention Grant
- Patent Title: CPP Magnetoresistive head with different thickness free layers for improved signal to noise ratio
- Patent Title (中): CPP磁阻头具有不同厚度的自由层，可提高信噪比
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Application No.: US11612942Application Date: 2006-12-19
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Publication No.: US07746603B2Publication Date: 2010-06-29
- Inventor: Hardayal S. Gill
- Applicant: Hardayal S. Gill
- Applicant Address: NL Amsterdam
- Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Patterson & Sheridan, L.L.P.
- Main IPC: G11B5/39
- IPC: G11B5/39
Abstract:
A magnetoresistive sensor and method for forming the magnetoresistive sensor. The magnetoresistive sensor includes a first layer and an antiparallel free layer disposed on the first layer. The antiparallel free layer includes a first free layer disposed on the first layer and a first ferromagnetic coupling free layer disposed on the first free layer. The first ferromagnetic coupling layer is configured to provide increased coupling between the first free layer and an antiferromagnetic coupling layer. The antiparallel free layer also includes the antiferromagnetic coupling layer disposed on the first ferromagnetic coupling free layer, a second ferromagnetic coupling free layer disposed on the antiferromagnetic coupling layer, and a second free layer disposed on the second ferromagnetic coupling free layer. The second ferromagnetic coupling layer is configured to provide increased coupling between the second free layer and the antiferromagnetic coupling layer.
Public/Granted literature
- US20080144235A1 CPP Magnetoresistive Head for Data Storage Applications Public/Granted day:2008-06-19
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