APPARATUS AND METHOD FOR DETECTING HEAD-MEDIUM CONTACT

PROBLEM TO BE SOLVED: To provide an apparatus and method for detecting head-medium contact.SOLUTION: 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...

Full description

Saved in:
Bibliographic Details
Main Authors SCOTT E RYUN, LIU DONGMING, KENNETH HAAPALA, LIN ZHOU
Format Patent
LanguageEnglish
Published 22.09.2014
Subjects
INFORMATION STORAGE
INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER
PHYSICS
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To provide an apparatus and method for detecting head-medium contact.SOLUTION: 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.
Bibliography:Application Number: JP20140046227