- 专利标题: Magnetic flux guiding devices all around main pole design without leading shield and side shields in assisted writing applications
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申请号: US16451137申请日: 2019-06-25
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公开(公告)号: US10714132B1公开(公告)日: 2020-07-14
- 发明人: Wenyu Chen , Ying Liu , Yan Wu , Yuhui Tang
- 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: G11B5/48
- IPC分类号: G11B5/48 ; G11B5/187 ; G11B5/11
摘要:
A perpendicular magnetic recording writer has a main pole (MP) with a first flux guiding (FG) device in a write gap between the MP trailing side and a trailing shield, a second FG device in each side gap and adjoining a MP side, and third FG device in the leading gap and adjoining the MP leading side. At least one of a first and second non-magnetic conductive layer (NMC1 and NMC2) contacts the third FG device and second FG devices, respectively, instead of a conventional leading shield and side shield. Each FG device has a flux guiding layer (FGL) with a magnetization that flips to oppose a gap flux field when a current is applied across the respective gap thereby enhancing the MP write field. NMC1 and NMC2 allow better wear and corrosion resistance in addition to improved return field and down-track field gradient, and acceptable side shield stray field.
公开/授权文献
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