Dynamic magnetic information storage or retrieval – Monitoring or testing the progress of recording
Reexamination Certificate
2006-02-14
2006-02-14
Hudspeth, David (Department: 2651)
Dynamic magnetic information storage or retrieval
Monitoring or testing the progress of recording
C360S046000, C360S053000, C360S068000, C360S025000
Reexamination Certificate
active
06999256
ABSTRACT:
A method of measuring the degree of thermal pole tip protrusion (TPTP) of a magnetic head and controlling a recording current in consideration of the degree of TPTP, in relation to a hard disk drive includes measuring the rate of errors contained in data by performing writing and reading operations while changing the level of an overshoot current (OSC), detecting a minimum error rate and a maximum error rate while changing a range of the OSC, and determining the degree of TPTP by measuring the difference between the minimum error rate and the error rate at the maximum OSC.
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Patent Abstract of Japan, Publication No. 2001229637, Published Aug. 24, 2001, Abstract Only.
Kim Jong-Yoon
Yeo Chang-dong
Davidson Dan I
Hudspeth David
Samsung Electronics Co,. Ltd.
Staas & Halsey , LLP
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