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MULTI-ANGLE HARD BIAS DEPOSITION FOR OPTIMAL HARD-BIAS DEPOSITION IN A MAGNETIC SENSOR
MULTI-ANGLE HARD BIAS DEPOSITION FOR OPTIMAL HARD-BIAS DEPOSITION IN A MAGNETIC SENSOR
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机译:磁传感器中最佳硬偏置沉积的多角度硬偏置沉积
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摘要
A method for manufacturing a magnetic sensor that result in improved magnetic bias field to the sensor, improved shield to hard bias spacing and a flatter top shield profile. The method includes a multi-angled deposition of the hard bias structure. After forming the sensor stack a first hard bias layer is deposited at an angle of about 70 degrees relative to horizontal. This is a conformal deposition. Then, a second deposition is performed at an angle of about 90 degrees relative to horizontal. This is a notching deposition, that results in notches being formed adjacent to the sensor stack. Then, a hard bias capping layer is deposited at an angle of about 55 degrees relative to horizontal. This is a leveling deposition that further flattens the surface on which the top shield can be electroplated.
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