Invention Grant
- Patent Title: Perpendicular magnetic recording write head with trailing shield having notch and throat height defined by nonmagnetic pad layer
- Patent Title (中): 垂直磁记录写头,后挡板具有由非磁性垫层限定的凹口和喉部高度
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Application No.: US11747656Application Date: 2007-05-11
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Publication No.: US07768743B2Publication Date: 2010-08-03
- Inventor: Hung-Chin Guthrie , Ming Jiang , Changqing Shi
- Applicant: Hung-Chin Guthrie , Ming Jiang , Changqing Shi
- 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
- Agent Thomas R. Berthold
- Main IPC: G11B5/127
- IPC: G11B5/127

Abstract:
A perpendicular magnetic recording write head supported on an air-bearing slider has a magnetic write pole (WP) with a WP end at the air-bearing surface (ABS) having a width generally equal to the data track width and a trailing shield (TS) with a TS end generally coplanar with the WP end. The TS has a first portion with a width at the TS end substantially wider than the width of the WP end and a TS notch (TSN) portion with a width at the TS end generally equal to the width of the WP end. The TS first portion has a height in a direction perpendicular to the ABS, and the TSN portion has a throat height (TH) in a direction perpendicular to the ABS that is less than the height of the TS first portion. A nonmagnetic gap layer separates the WP from the TSN portion and a nonmagnetic pad layer separates the WP from the TS first portion. The pad layer has a front edge generally parallel to and recessed from the ABS that defines the TH of the TSN portion, and a thickness that defines the length of the TSN portion in the along-the-track direction.
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