Invention Grant
- Patent Title: Perpendicular magnetic recording write head with a self aligned stitched write shield
- Patent Title (中): 垂直磁记录写头与自对准缝合写屏蔽
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Application No.: US12001350Application Date: 2007-12-11
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Publication No.: US07701666B2Publication Date: 2010-04-20
- Inventor: Cherng-Chyi Han , Kenichi Takano
- Applicant: Cherng-Chyi Han , Kenichi Takano
- 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: G11B5/17
- IPC: G11B5/17

Abstract:
A perpendicular magnetic recording (PMR) head with single or double coil layers has a small write shield stitched onto a main write shield. The stitched shield allows the main write pole to produce a vertical write field with sharp vertical gradients that is reduced on both sides of the write pole so that adjacent track erasures are eliminated. From a fabrication point of view, both the main pole and the stitched shield are defined and formed using a single photolithographic process, a trim mask and CMP lapping process so that the main shield can be stitched onto a self-aligned main pole and stitched shield.
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Information query
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