RESISTIVE TEMPERATURE SENSORS FOR IMPROVED ASPERITY, HEAD-MEDIA SPACING, AND/OR HEAD-MEDIA CONTACT DETECTION
A sensor supported by a head transducer has a temperature coefficient of resistance (TCR) and a sensor resistance. The sensor operates at a temperature above ambient and is responsive to changes in sensor-medium spacing. Conductive contacts connected to the sensor have a contact resistance and a cro...
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Main Authors | , , , |
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Format | Patent |
Language | English |
Published |
22.12.2016
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Subjects | |
Online Access | Get full text |
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Summary: | A sensor supported by a head transducer has a temperature coefficient of resistance (TCR) and a sensor resistance. The sensor operates at a temperature above ambient and is responsive to changes in sensor-medium spacing. Conductive contacts connected to the sensor have a contact resistance and a cross-sectional area adjacent to the sensor larger than that of the sensor, such that the contact resistance is small relative to the sensor resistance and negligibly contributes to a signal generated by the sensor. A multiplicity of head transducers each support a TCR sensor and a power source can supply bias power to each sensor of each head to maintain each sensor at a fixed temperature above an ambient temperature in the presence of heat transfer changes impacting the sensors. A TCR sensor of a head transducer can include a track-oriented TCR sensor wire for sensing one or both of asperities of the medium. |
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Bibliography: | Application Number: US201615251663 |