Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2005-06-07
2008-01-01
Kim, Paul D. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603150, C029S603160, C029S603180, C029S829000, C216S062000, C216S066000, C216S067000, C360S125020, C360S125330, C360S317000, C427S127000, C427S128000, C438S689000
Reexamination Certificate
active
07313863
ABSTRACT:
An improved mold, for use in the formation of a perpendicular magnetic write head, is described, together with a process for its manufacture. Conventional alumina is replaced by tantalum in the yoke portion of the mold. When both the tantalum and the alumina areas are simultaneously subjected to reactive ion etching, sloping sidewalls are obtained in the alumina area (write pole tip portion) whereas the sidewalls are almost vertical in the tantalum (yoke) area, resulting in a uniform neck height.
REFERENCES:
patent: 4656546 (1987-04-01), Mallory
patent: 4672493 (1987-06-01), Schewe
patent: 5839193 (1998-11-01), Bennin et al.
patent: 6504675 (2003-01-01), Shukh et al.
patent: 6510024 (2003-01-01), Otsuka et al.
patent: 6614620 (2003-09-01), Tagawa et al.
patent: 6620669 (2003-09-01), Hijzen et al.
patent: 6854175 (2005-02-01), Sasaki
patent: 2002/0041465 (2002-04-01), Sasaki
patent: 2004/0175596 (2004-09-01), Inomata et al.
Li Donghong
Sasaki Yoshitaka
Ackerman Stephen B.
Headway Technologies Inc.
Kim Paul D.
Saile Ackerman LLC
LandOfFree
Method to form a cavity having inner walls of varying slope does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method to form a cavity having inner walls of varying slope, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method to form a cavity having inner walls of varying slope will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3963678