Head-medium contact detection using introduced heat oscillation

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United States of America Patent

PATENT NO 9047898
APP PUB NO 20140254040A1
SERIAL NO

14165906

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An apparatus includes a head transducer configured to interact with a magnetic recording medium and a heater configured to thermally actuate the head transducer. A thermal sensor at or near the head transducer is configured to produce a sensor signal. Circuitry is coupled to the heater and configured to cause an oscillation in heater power. The heater power oscillation causes an oscillation in the sensor signal. A detector is coupled to the thermal sensor and configured to detect head-medium contact using the oscillating sensor signal and heater power.

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Patent Owner(s)

  • SEAGATE TECHNOLOGY LLC

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Haapala, Kenneth Plymouth, US 11 154
Liu, Dongming Eden Prairie, US 22 211
Ryun, Scott E Chaska, US 21 305
Zhou, Lin Eagan, US 202 990

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