Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2007-12-27
2010-11-16
Kim, Paul D (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603070, C029S603130, C029S254000, C029S603150, C029S603180, C205S199000, C205S122000, C360S121000, C360S122000, C360S317000, C428S811000, C428S815000, C428S816000
Reexamination Certificate
active
07832085
ABSTRACT:
A method of manufacturing a magnetic head includes the steps of: fabricating a substructure in which pre-head portions are aligned in a plurality of rows by forming components of a plurality of magnetic heads on a single substrate; and fabricating the plurality of magnetic heads by separating the pre-head portions from one another through cutting the substructure. In the step of fabricating the substructure, the resistance of an MR film that will be formed into an MR element by undergoing lapping later is detected to determine the target position of the boundary between a track width defining portion and a wide portion of a pole layer based on the resistance detected, and the pole layer is thereby formed. In the step of fabricating the magnetic heads, the surface formed by cutting the substructure is lapped such that the MR film is lapped and the resistance thereof thereby reaches a predetermined value.
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Mar. 25, 2010 Office Action issued in U.S. Appl. No. 11/723,127.
Kagami Takeo
Sakamoto Takamitsu
Sasaki Tetsuro
Watabe Yuichi
Kim Paul D
Oliff & Berridg,e PLC
TDK Corporation
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