Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2009-08-19
2011-11-15
Kim, Paul D (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603110, C029S603130, C029S603140, C029S603150, C029S603180, C360S121000, C360S122000, C360S317000, C451S005000, C451S041000, C216S062000, C216S065000, C216S066000
Reexamination Certificate
active
08056214
ABSTRACT:
A magnetic head includes a pole layer, first and second side shields, and an encasing layer having a pole groove that accommodates the pole layer and first and second side shield grooves that accommodate the first and second side shields. In a manufacturing method for the magnetic head, the pole groove and first and second initial side shield grooves are formed in a nonmagnetic layer using an etching mask layer having first to third openings. In the manufacturing method, a wall face of the first initial side shield groove that is closer to the pole groove and a wall face of the second initial side shield groove that is closer to the pole groove are etched by dry etching to thereby complete the first and second side shield grooves.
REFERENCES:
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U.S. Appl. No. 12/457,090, filed Jun. 1, 2009, in the name of Kazuo Ishizaki et al.
Araki Hironori
Iljima Atsushi
Ishizaki Kazuo
Ito Hiroyuki
Sasaki Yoshitaka
Headway Technologies Inc.
Kim Paul D
Oliff & Berridg,e PLC
SAE Magnetics (H.K. ) Ltd.
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