Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2006-08-22
2006-08-22
Kim, Paul D. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603070, C029S603140, C029S605000, C029S606000, C360S125330, C360S317000, C427S127000, C427S128000
Reexamination Certificate
active
07093348
ABSTRACT:
The object of the invention is to provide a thin film magnetic head and a method of manufacturing the same, which allow the magnetic pole width to be precisely controlled and a sufficient overwrite performance to be attained even in a case where the magnetic pole width is microfabricated. The coupling position where the intermediate portion and the tip of the top pole are coupled each other is located closer to the air bearing surface than the throat height0position (TH0position) which is the reference point for determining the throat height TH. The tip of the top pole defines the write track width on a recording medium. At least the portion of the intermediate portion from the TH0position to the rear edge portion of the tip has a width wider than that of the tip. The intermediate portion suppresses saturation of the magnetic flux before flowing into the tip of the top pole.
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“Fabrication of thin film inductive heads with top core separated structure”; Kawabe, T.; Fuyama, M.; Narishige, S.; Sugita, Y.; Magnetics, IEEE Transactions on vol. 27, Issue 6, Nov. 1991 pp. 4936-4938.
Kim Paul D.
Oliff & Berridg,e PLC
TDK Corporation
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