发明授权
US08879208B1 Umbrella shield writer (UmSW) design for perpendicular magnetic recording (PMR)
有权
用于垂直磁记录(PMR)的伞形屏蔽刻录机(UmSW)设计
- 专利标题: Umbrella shield writer (UmSW) design for perpendicular magnetic recording (PMR)
- 专利标题(中): 用于垂直磁记录(PMR)的伞形屏蔽刻录机(UmSW)设计
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申请号: US14093969申请日: 2013-12-02
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公开(公告)号: US08879208B1公开(公告)日: 2014-11-04
- 发明人: Yue Liu , Yaguang Wei , Yuhui Tang , Moris Dovek
- 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: G11B5/127
- IPC分类号: G11B5/127
摘要:
An umbrella shield (UmS) is included as the uppermost magnetic layer in a trailing shield design in a read/write head to reduce stray field effects, lower bit error rate, and improve protrusion profile for better touch down detection. The UmS may be exposed or recessed from an air bearing surface (ABS), and has a cross-track width, down-track thickness, and length toward a back side that is greater than the corresponding width, thickness, and length dimensions of an underlying PP3 trailing shield. UmS may substantially conform to an arched PP3 shield shape or may be a flat layer. An insulation layer with a thickness of at least 0.3 microns is formed between the UmS and PP3 trailing shield to prevent undesirable coupling. The UmS preferably has a width greater than any other shield in the read/write head.
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