Metal working – Method of mechanical manufacture – Electrical device making
Reexamination Certificate
2006-12-26
2006-12-26
Kim, Paul D. (Department: 3729)
Metal working
Method of mechanical manufacture
Electrical device making
C029S603070, C029S603140, C029S603150, C029S603160, C029S603180, C216S022000, C216S039000, C216S041000, C216S048000, C360S324100, C360S324110, C360S324120, C360S324200, C427S127000, C427S128000
Reexamination Certificate
active
07152304
ABSTRACT:
Patterned, longitudinally and transversely antiferromagnetically exchange biased GMR sensors are provided which have narrow effective trackwidths and reduced side reading. The exchange biasing significantly reduces signals produced by the portion of the ferromagnetic free layer that is underneath the conducting leads while still providing a strong pinning field to maintain sensor stability. In the case of the transversely biased sensor, the magnetization of the free and biasing layers in the same direction as the pinned layer simplifies the fabrication process and permits the formation of thinner leads by eliminating the necessity for current shunting.
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Co-pending U.S. Patent HT-01-032, U.S. Appl. No. 10/091,959, filed Mar. 6, 2002, “Easily Manufactured Exchange Bias Stabilization Scheme”, assigned to the same assignee as the present invention.
Co-pending U.S. Patent HT-01-037, U.S. Appl. No. 10/077,064, filed Feb. 15, 2002, “Synthetic Pattern Exchange Configuration for Side Reading Reduction”, assigned to the same assignee as the present invention.
Han Cherng Chyi
Horng Cheng T.
Ju Kochan
Li Min
Li Yun-Fei
Ackerman Stephen B.
Headway Technologies Inc.
Kim Paul D.
Saile Ackerman LLC
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