Invention Grant
- Patent Title: Lead plating method for GMR head manufacture
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Application No.: US11266418Application Date: 2005-11-03
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Publication No.: US07111386B2Publication Date: 2006-09-26
- Inventor: Chao-Peng Chen , Kevin Lin , Jei-Wei Chang , Kochan Ju , Hui-Chuan Wang
- Applicant: Chao-Peng Chen , Kevin Lin , Jei-Wei Chang , Kochan Ju , Hui-Chuan Wang
- 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: G11B5/127
- IPC: G11B5/127 ; H04R31/00

Abstract:
A major problem in Lead Overlay design for GMR structures is that the magnetic read track width is wider than the physical read track width. This is due to high interfacial resistance between the leads and the GMR layer which is an unavoidable side effect of prior art methods. The present invention uses electroplating preceded by a wet etch to fabricate the leads. This approach requires only a thin protection layer over the GMR layer to ensure that interface resistance is minimal. Using wet surface cleaning avoids sputtering defects and plating is compatible with this so the cleaned surface is preserved Only a single lithography step is needed to define the track since there is no re-deposition involved.
Public/Granted literature
- US20060048375A1 Lead plating method for GMR head manufacture Public/Granted day:2006-03-09
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