Thin Film Application in Magnetic Recording - NCCAVS - User Groups

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Read Head/TMR Sensor Working PrincipleReader Magnetic Config and SignalΔRa bcbacSignal OutputΔV=I*ΔRH appliedTMR (Tunneling Magnetoresistive) Field-Resistance SensorRmaxAlO TMRRminNVE IEEE 2004© 2012 HGST, a Western Digital company HGST ConfidentialZ. Gao6
Read Sensor General Structure and FunctionS2Capping LayersFree FM LayersBarrier LayersRef. FM LayersAP Coupled LayersRef. FM LayersAFM Pinning LayersSeed LayersS1Capping Layer: (10-50Å; 1-3 Layers)Free FM Layer: (30-80Å; 1-5 Layers)Barrier Layers: (~10Å; 1-4 Layers)Ref.+Pinned Layers: (~30-60Å; 2-10 Layers)AFM Pinning Layer: (40-80Å; 1 Layer)Seed Layers: (> 20A, 2-5 Layers)All Layers (>20) are Deposited in PVD Cluster w/o Vacuum Break (BP 5E-09)© 2012 HGST, a Western Digital company HGST ConfidentialZ. Gao7
Page 1 and 2: Thin Film Application inMagnetic Re
Page 3 and 4: Perpendicular Recording Head and Me
Page 5: Read Head and Read SensorFujitsu Re
Page 9 and 10: Thin Film Oblique DepositionMagneti
Page 11 and 12: Thin Film Read Magnetic SensorMgO T
Page 13 and 14: PVD Tools for Magnetic SensorAnelva

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