Invention Grant
- Patent Title: Perpendicular magnetic recording (PMR) writer with hybrid shield layers
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Application No.: US15361726Application Date: 2016-11-28
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Publication No.: US09626990B2Publication Date: 2017-04-18
- Inventor: Yuhui Tang , Yaguang Wei , Jiun-Ting Lee
- Applicant: Headway Technologies, Inc.
- 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: G11B5/187
- IPC: G11B5/187 ; G11B5/11 ; G11B5/127 ; G11B5/31

Abstract:
A perpendicular magnetic recording writer with an all wrap around (AWA) shield design wherein one or more of the leading shield, trailing shield, and side shields comprises a magnetic hot seed layer made of a >19 kG to 24 kG material that adjoins a gap layer, and a side of the hot seed layer opposite the gap layer adjoins a high damping magnetic layer made of a 10-16 kG material (or a 16-19 kG material in the trailing shield) having a Gilbert damping parameter a >0.04. In one embodiment, the high damping magnetic layer is FeNiRe with a Re content of 3 to 15 atomic %. The main pole leading and trailing sides may be tapered. Side shields may have a single taper or dual taper structure. Higher writer speed with greater areal density capability is achieved.
Public/Granted literature
- US20170076742A1 Perpendicular Magnetic Recording (PMR) Writer with Hybrid Shield Layers Public/Granted day:2017-03-16
Information query
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