Invention Grant
- Patent Title: PMR write head with assisted magnetic layer
- Patent Title (中): PMR写头与辅助磁性层
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Application No.: US13066178Application Date: 2011-04-08
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Publication No.: US08284516B1Publication Date: 2012-10-09
- Inventor: Yuhui Tang , Lijie Guan , Tai Min , Suping Song
- Applicant: Yuhui Tang , Lijie Guan , Tai Min , Suping Song
- Applicant Address: US CA Milpitas
- Assignee: Headway Technologies, Inc.
- Current Assignee: Headway Technologies, Inc.
- Current Assignee Address: US CA Milpitas
- Agency: Saile Ackerman LLC
- Agent Stephen B. Ackerman
- Main IPC: G11B5/127
- IPC: G11B5/127
Abstract:
A PMR writer is disclosed wherein a magnetic assist layer (MAL) made of an anisotropic (−Ku) or (+Ku) magnetic material is formed along a main pole trailing side to optimize the vertical magnetic field and field gradient at the air bearing surface. A Ru seed layer is formed between the main pole and (−Ku) MAL to induce a hard axis direction toward the main pole. A (−Ku) MAL is preferably comprised of hcp-CoIr while CoPt and FePt are examples of a (+Ku) MAL. The MAL has a down-track thickness from 5 to 20 nm, a width equal to the track width in a cross-track direction, and extends 100 to 500 nm in a direction toward a back end of the main pole. As a result, flux leakage from the main pole to trailing shield is reduced and aerial density is increased. A method for fabricating the PMR writer is provided.
Public/Granted literature
- US20120257305A1 PMR WRITE HEAD WITH ASSISTED MAGNETIC LAYER Public/Granted day:2012-10-11
Information query
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