Analysis of thermal flying-height control slider in a hard disk drive under humid air condition

Jonghak Choi, Kyoung Su Park, No Cheol Park, Young Pil Park, Eo Jin Hong, Yonghyun Lee, Cheol Soon Kim

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Thermal flying-height control (TFC) technology is now widely applied in the hard disk drive (HDD) industry, because it enables consistent read/write spacing, increases storage density and improves HDD reliability. In a TFC slider, the air bearing pressure at the transducer area can be raised to ten or fifteen times the ambient pressure and it can decrease the air bearing pressure. This paper investigates the effect of humid air condition in TFC slider. It is found that because of the high pressure in transducer area of slider, the water molecules are condensed and the air bearing pressure is changes. Therefore, the slider cannot maintain the flying attitude and the flying-height is changed. Moreover, the change of air pressure causes the change of heat transfer coefficient between slider and air bearing. Consequently, it causes a change of the performance in TFC slider. And in higher humidity and temperature, the effect is intensified.

Original languageEnglish
Pages (from-to)2789-2796
Number of pages8
JournalMicrosystem Technologies
Issue number12
Publication statusPublished - 2015 Dec 1

Bibliographical note

Publisher Copyright:
© 2015, Springer-Verlag Berlin Heidelberg.

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Hardware and Architecture
  • Electrical and Electronic Engineering


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