Pit detection using a contact sensor

J. Xu, Y. Shimizu, J. Liu, T. Shiramatsu, M. Furukawa, J. Li, H. Kohira

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)


Pit detection study of a thermal contact sensor was carried out by both experiments and simulation. The experimental results showed that the thermal contact sensor was able to detect a small pit with fairly good sensitivity. And the simulation study revealed that the mechanism of pit detection is due to worse cooling, which results in higher sensor temperature, because the sensor/disk spacing is larger on the pit compared with at nominal flying state. And the temperature increase of sensor can be attributed to worse heat flux due to both larger spacing and air-bearing pressure drop when the sensor is above the pit.

Original languageEnglish
Article number6522227
Pages (from-to)2715-2718
Number of pages4
JournalIEEE Transactions on Magnetics
Issue number6
Publication statusPublished - 2013


  • Contact sensor
  • disk defect
  • head disk interface

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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