Invention Grant
- Patent Title: Double notched shield and pole structure for stray field reduction in a magnetic head
- Patent Title (中): 用于磁头中杂散场减少的双切口屏蔽和极结构
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Application No.: US10977446Application Date: 2004-10-29
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Publication No.: US07649711B2Publication Date: 2010-01-19
- Inventor: Kuok San Ho , Yimin Hsu , Ching Hwa Tsang
- Applicant: Kuok San Ho , Yimin Hsu , Ching Hwa Tsang
- Applicant Address: NL Amsterdam
- Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee: Hitachi Global Storage Technologies Netherlands B.V.
- Current Assignee Address: NL Amsterdam
- Agency: Zilka-Kotab, PC
- Main IPC: G11B5/147
- IPC: G11B5/147

Abstract:
A double notched magnetic structure for use in a magnetic head for avoiding stray field writing. The structure could be a magnetic shield, magnetic pole of a write head or some other magnetic structure used in a magnetic head of a magnetic recording system, and has notches formed at both the front end (adjacent to the ABS) and at the back end (away from the ABS). The notches at the front end form a forward protruding portions that performs the necessary function of the structure, such as magnetic shielding, and has laterally extending recessed portions (recessed by the front notches) that move the flux focal points of the structure away from the ABS to avoid stray field writing. The back notches form a backward extending portion that affects the geometry of the structure to prevent the focusing of magnetic flux caused by stray magnetic fields having a component perpendicular to the ABS.
Public/Granted literature
- US20060092566A1 Double notched shield and pole structure for stray field reduction in a magnetic head Public/Granted day:2006-05-04
Information query
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