Dynamic magnetic information storage or retrieval – Head – Magnetoresistive reproducing head
Reexamination Certificate
2005-01-12
2009-10-13
Wellington, Andrea L (Department: 2627)
Dynamic magnetic information storage or retrieval
Head
Magnetoresistive reproducing head
C360S324200
Reexamination Certificate
active
07602590
ABSTRACT:
The conventional free layer in a TMR read head has been replaced by a composite of two or more magnetic layers, one of which is iron rich The result is an improved device that has a higher MR ratio than prior art devices, while still maintaining free layer softness and acceptable magnetostriction. A process for manufacturing the device is also described.
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Co-pending U.S. Patent HT-04-043 B, U.S. Appl. No. 11/034,114, filed Jan. 12, 2005, “Tunneling Magneto-Resistive Spin Valve Sensor with Novel Composite Free Layer,” assigned to the same assigner as the current invention.
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Co-pending U.S. Patent HT-04-015, U.S. Appl. No. 10/854,651, filed May 26, 2004, “Improved Free Layer for CPP GMR Having Iron Rich Ni Fe,” assiged to the same assignee as present invention.
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Torng Chyu-Jiuh
Wang Hui-Chuan
Zhao Tong
Ackerman Stephen B.
Dravininkas Adam B
Headway Technologies Inc.
Saile Ackerman LLC
Wellington Andrea L
LandOfFree
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