Patterned, synthetic longitudinally exchange biased GMR sensor

Details Patterned, synthetic longitudinally exchange biased GMR sensor Patterned, synthetic longitudinally exchange biased GMR sensor

2008-07-15

2008-07-15

Chen, Tianjie (Department: 2627)

Dynamic magnetic information storage or retrieval

Head

Magnetoresistive reproducing head

Reexamination Certificate

active

07400475

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. 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. 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.

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