- 专利标题: Write head designs with sandwich trailing shield (STS) for high data rate perpendicular recording
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申请号: US15990092申请日: 2018-05-25
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公开(公告)号: US10311899B2公开(公告)日: 2019-06-04
- 发明人: Yue Liu , Ying Liu , Yuhui Tang , Jiun-Ting Lee , Moris Dovek , Yiming Wang
- 申请人: Headway Technologies, Inc.
- 申请人地址: US CA Milpitas
- 专利权人: Headway Technologies, Inc.
- 当前专利权人: Headway Technologies, Inc.
- 当前专利权人地址: US CA Milpitas
- 代理机构: Saile Ackerman LLC
- 代理商 Stephen B. Ackerman
- 主分类号: G11B5/31
- IPC分类号: G11B5/31 ; G11B5/127 ; G11B5/187 ; G11B5/39 ; G11B5/008
摘要:
A PMR writer is disclosed with an all wrap around (AWA) shield design in which one or more of the leading shield, side shields, and trailing shield (TS) structure (except the hot seed layer) at the air bearing surface (ABS) are comprised of an alloy having a damping parameter α of ≥0.04 to minimize wide area track erasure (WATE). The TS structure comprises two outer magnetic layers with an 8-16 kiloGauss (kG) saturation magnetic moment (Ms) on each side of a center stack with a lower write gap, a middle hot seed layer (Ms of 19-24 kG), and an upper magnetic layer (Ms of 16-24 kG). The hot seed layer, and upper TS magnetic layer promote improved area density capability (ADC). A second TS layer with Ms of 16-24 kG and a full width at the ABS may be formed on the upper magnetic layer.
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