Invention Grant
- Patent Title: Lead plating method for GMR head manufacture
- Patent Title (中): GMR头制造的铅电镀方法
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Application No.: US10093106Application Date: 2002-03-07
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Publication No.: US06973712B2Publication Date: 2005-12-13
- 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
- Agent George O. Saile; Stephen B. Ackerman
- Main IPC: G11B5/31
- IPC: G11B5/31 ; G11B5/39 ; 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
- US20030167626A1 Lead plating method for GMR head manufacture Public/Granted day:2003-09-11
Information query
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