发明授权
- 专利标题: PMR write head with narrow gap for minimal internal flux loss
- 专利标题(中): PMR写头具有窄间隙,用于最小内部通量损失
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申请号: US13066095申请日: 2011-04-06
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公开(公告)号: US08238059B1公开(公告)日: 2012-08-07
- 发明人: Yuhui Tang , Lijie Guan , Tai Min , Suping Song
- 申请人: Yuhui Tang , Lijie Guan , Tai Min , Suping Song
- 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:
A PMR writer is disclosed wherein one or more of a trailing shield, leading shield, and side shields are composites with a first section made of an anisotropic (-Ku) magnetic layer adjoining a gap layer and a second section comprised of an isotropic soft magnetic layer formed on a side of the first section that faces away from the main pole. There may be a non-magnetic Ru layer between each first and second section to prevent interlayer coupling. Each first section has a hard axis in a direction toward the main pole and is comprised of hcp-CoIr, dhcp-CoFe, a′-Fe—C, or NiAs-type Mn50Sb50 with a thickness from 50 to 500 nm. As a result, flux leakage from the main pole to a shield structure is reduced and area density is increased. A method for fabricating a composite shield structure is also provided.
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