Invention Grant
- Patent Title: Non-uniform write gap perpendicular writer for shingle writing
- Patent Title (中): 用于瓦片写入的非均匀写入间隙垂直写入器
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Application No.: US14033736Application Date: 2013-09-23
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Publication No.: US08896965B2Publication Date: 2014-11-25
- Inventor: Lijie Guan
- 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: G11B5/23
- IPC: G11B5/23 ; G11B5/31 ; G11B5/10 ; G11B5/127

Abstract:
A PMR writer is disclosed that includes at least one of a recessed center section in the write pole trailing edge and a center recessed trailing shield to improve the field gradient at track edge. In all embodiments, there is a non-uniform write gap between the trailing edge and the trailing shield. The recessed portion of the write pole trailing edge and/or center recess of the trailing shield has a thickness from 10 to 40 nm in a down-track direction and a width in a cross-track direction of 20 to 200 nm. The distance between the center recess and a corner of the trailing edge is from 20 to 80 nm. A sequence of steps is provided to fabricate the two embodiments of the present invention.
Public/Granted literature
- US20140016232A1 Non-Uniform Write Gap Perpendicular Writer for Shingle Writing Public/Granted day:2014-01-16
Information query
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