Invention Grant
- Patent Title: Perpendicular magnetic recording head with a bottom side shield
- Patent Title (中): 垂直磁记录头带底侧屏蔽
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Application No.: US13135276Application Date: 2011-06-30
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Publication No.: US08189295B2Publication Date: 2012-05-29
- Inventor: Cherng-Chyi Han , Min Li , Fenglin Liu , Lijie Guan
- Applicant: Cherng-Chyi Han , Min Li , Fenglin Liu , Lijie Guan
- 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 perpendicular magnetic recording (PMR) head has a pole tip shielded laterally by a separated pair of bottom side shields and shielded from above by an upper shield. The bottom side shields surround a lower portion of the pole tip while the upper portion of the pole tip is surrounded by non-magnetic layers. The bottom shields and the non-magnetic layer form a wedge-shaped trench in which the pole tip has been formed by a self-aligned plating process. A write gap layer and an upper shield is formed above the side shields and pole. The resulting structure substantially eliminates track overwrite while maintaining good track definition.
Public/Granted literature
- US20110261486A1 Perpendicular magnetic recording head with a bottom side shield Public/Granted day:2011-10-27
Information query
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