Improved air-gap control for SIL-based near-field recording system

Joong Gon Kim, Tae Hun Kim, Hyun Choi, Yong Joong Yoon, Jun Jeong, No Cheol Park, Hyunseok Yang, Young Pil Park

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


We propose a gap servo method to reduce the overshoot in the near-field (NF) region. In general, we use a mode-switching servo which consists of approach, hand-over, and gap-control modes. However, there is a critical problem, such as an overshoot at the turning point from the approach mode to the hand-over mode, which may cause a collision between the SIL and the disk. In this paper, we propose an improved NF gap servo system using an exponential input in the approach mode which can reduce the overshoot and settling time of the mode-switching servo.

Original languageEnglish
Pages (from-to)811-813
Number of pages3
JournalIEEE Transactions on Magnetics
Issue number2
Publication statusPublished - 2007 Feb

Bibliographical note

Funding Information:
This work was supported by the Yonsei Center for Opto-Mechatronics, designated as a Specialization Project by Yonsei University.

All Science Journal Classification (ASJC) codes

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


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