Invention Grant
- Patent Title: Current-assisted magnetic recording write head with improved write gap structure
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Application No.: US16277953Application Date: 2019-02-15
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Publication No.: US10679650B2Publication Date: 2020-06-09
- Inventor: Zhigang Bai , Venkatesh Chembrolu , Yaguang Wei , Terence Lam , Michael Kuok San Ho , Lijie Guan , Suping Song , Supradeep Narayana
- Applicant: Western Digital Technologies, Inc.
- Applicant Address: US CA San Jose
- Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee: WESTERN DIGITAL TECHNOLOGIES, INC.
- Current Assignee Address: US CA San Jose
- Agency: Patterson & Sheridan, LLP
- Agent Steven Versteeg
- Main IPC: G11B5/235
- IPC: G11B5/235 ; G11B5/23 ; G11B5/127 ; G11B5/31

Abstract:
A current-assisted magnetic recording write head has an electrically conductive layer in the write gap between the write pole and the trailing shield. Electrical circuitry directs current from the write pole, through the conductive layer, to the trailing shield. The current through the conductive layer generates an Ampere field substantially orthogonal to the magnetization in the write pole to assist magnetization switching of the write pole. The write head's magnetic throat height (THm) is substantially the thickness of the trailing shield at the write gap, while the write head's electrical throat height (THe) is substantially the height of the conductive layer in the write gap. In embodiments of this invention, the signal-to-noise ratio (SNR) of the readback signal and the soft error rate (SER) of the recorded data can be improved with a write gap structure wherein THe is greater than THm.
Public/Granted literature
- US20200005815A1 CURRENT-ASSISTED MAGNETIC RECORDING WRITE HEAD WITH IMPROVED WRITE GAP STRUCTURE Public/Granted day:2020-01-02
Information query
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