Asperity and head-media contact detection using multi-stage temperature coefficient of resistance sensor

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United States of America Patent

PATENT NO 9111572
SERIAL NO

14287412

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Abstract

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A multi-stage sensor is situated on the head transducer and configured to interact with a magnetic recording medium. A first sensor stage of the multi-stage sensor has a temperature coefficient of resistance. A second sensor stage of the multi-stage sensor is coupled to the first sensor and has a temperature coefficient of resistance. The first sensor stage is configured to preferentially sense asperities of the media relative to the second sensor stage, and the second sensor stage configured to preferentially sense proximity to, and contact with, a surface of the media relative to the first sensor stage. The first and second sensor stages may be connected in series or in parallel.

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Patent Owner(s)

  • SEAGATE TECHNOLOGY LLC

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Brand, John L Burnsville, US 26 397
Kunkel, Gary Joseph Minneapolis, US 12 45

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