发明授权
US06223420B1 Method of making a read head with high resistance soft magnetic flux guide layer for enhancing read sensor efficiency
失效
制造具有高阻软磁通导向层的读头的方法,以提高读取传感器的效率
- 专利标题: Method of making a read head with high resistance soft magnetic flux guide layer for enhancing read sensor efficiency
- 专利标题(中): 制造具有高阻软磁通导向层的读头的方法,以提高读取传感器的效率
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申请号: US09206016申请日: 1998-12-04
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公开(公告)号: US06223420B1公开(公告)日: 2001-05-01
- 发明人: Wen Yaung Lee , Tsann Lin , Daniele Mauri , David John Seagle
- 申请人: Wen Yaung Lee , Tsann Lin , Daniele Mauri , David John Seagle
- 主分类号: G11B542
- IPC分类号: G11B542
摘要:
A read head has a flux guide layer that is immediately adjacent (abuts) the back edge of a read sensor. The flux guide layer is made of a high resistance soft magnetic material that conducts magnetic flux from the back edge of the read sensor so that the magnetic response at the back edge of the read sensor is significantly higher than zero. This increases the efficiency of the read sensor. The material for the flux guide layer is A-B-C where A is selected from the group Fe and Co, B is selected from the group Hf, Y, Ta and Zr and C is selected from the group O and N. In a preferred embodiment A-B-C is Fe—Hf—O and the Ms&rgr; of the flux guide layer is greater than 50 times the Ms&rgr; of the read sensor layer where the read sensor layer is NiFe, Ms is saturation magnetization and &rgr; is resistivity. Because of the flux guides high resistance current shunting losses are nearly eliminated.