Invention Grant
- Patent Title: Method of forming a perpendicular magnetic recording (PMR) write head with patterned leading edge taper
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Application No.: US16296349Application Date: 2019-03-08
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Publication No.: US10657988B2Publication Date: 2020-05-19
- Inventor: Ying Liu , Yuhui Tang , Jiun-Ting Lee , Yue Liu
- 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 ; G11B5/11 ; G11B5/127 ; G11B5/187 ; G11B5/235

Abstract:
A method is disclosed for forming a perpendicular magnetic recording writer with an all wrap around (AWA) shield design wherein a surface of the leading shield that contacts the lead gap has a notch that is recessed 20 to 120 nm from the air bearing surface (ABS) and has a first side with a down-track dimension of 20-200 nm that is aligned parallel to the ABS. In one embodiment, the notch is aligned below the main pole leading side and has a cross-track width substantially the same as the track width of the main pole trailing side. The notch has two sidewalls formed equidistant from a center plane that bisects the leading shield wherein each sidewall intersects the first side at an angle of 90 to 170 degrees. Accordingly, overwrite and bit error rate are improved while adjacent track interference and tracks per square inch capability are substantially maintained.
Public/Granted literature
- US20190206428A1 Method of Forming a Perpendicular Magnetic Recording (PMR) Write Head with Patterned Leading Edge Taper Public/Granted day:2019-07-04
Information query
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