Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2008-03-18
2008-03-18
Kim, Paul D. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603110, C029S603130, C029S603150, C029S603180, C029S605000, C029S606000, C216S062000, C216S066000, C216S067000, C360S121000, C360S125330, C360S317000, C427S127000, C427S128000, C451S005000, C451S041000
Reexamination Certificate
active
07343668
ABSTRACT:
A method of manufacturing a perpendicular magnetic recording head is provided. The method accurately defines a gap layer. The method includes forming a lower gap layer made of a non-magnetic material on a main magnetic pole layer. An upper gap layer is formed on the lower gap layer, the upper gap layer being made of the non-magnetic material. A resist layer is formed on the upper gap layer, and the resist layer is removed from an end surface. The upper gap layer not covered with the resist layer is removed, while exposing a new film surface by removing a surface oxidation layer of the resist layer. A return path layer is formed by plating on the exposed lower gap layer, the upper gap layer, and the resist layer through the plating underlayer.
REFERENCES:
patent: 6266216 (2001-07-01), Hikami et al.
patent: 6751071 (2004-06-01), Yazawa et al.
patent: 2005/0083608 (2005-04-01), Watanabe
patent: 2005-122831 (2005-05-01), None
Alps Electric Co. Ltd
Brinks Hofer Gilson & Lione
Kim Paul D.
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