Improved gap servo system using a brake pulse for a SIL-based near-field recording system

Jung Gon Kim; Min Seok Kang; Won Ho Shin; No Cheol Park; Hyun Seok Yang; Young Pil Park; Jinkyung Lee; Ansik Jeong; Jonghyun Shin; Kyunggeun Lee

doi:10.1007/s00542-009-0896-0

Improved gap servo system using a brake pulse for a SIL-based near-field recording system

Jung Gon Kim, Min Seok Kang, Won Ho Shin, No Cheol Park, Hyun Seok Yang, Young Pil Park, Jinkyung Lee, Ansik Jeong, Jonghyun Shin, Kyunggeun Lee

Department of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

A mode-switching servo is widely used in solid immersion lens (SIL)-based near-field recording (NFR) systems to control the air gap between the bottom surface of the SIL and the top surface of the rotating media. In the mode-switching servo, it is very important to reduce the initial overshoot in the near field region, as this overshoot can cause collisions between the SIL and the media, and increase the settling time required for the SIL to be initially moved to the final air gap. In this paper, the mode-switching servo with a brake pulse is proposed to reduce the initial overshoot and settling time. The effectiveness of the proposed method is proved by experiments of which results show that the minimum air gap due to the initial overshoot is improved from 6.86 to 18.73 nm and the settling time is reduced from 30 to 4.5 ms.

Original language	English
Pages (from-to)	309-315
Number of pages	7
Journal	Microsystem Technologies
Volume	16
Issue number	1-2
DOIs	https://doi.org/10.1007/s00542-009-0896-0
Publication status	Published - 2010 Jan

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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title = "Improved gap servo system using a brake pulse for a SIL-based near-field recording system",

abstract = "A mode-switching servo is widely used in solid immersion lens (SIL)-based near-field recording (NFR) systems to control the air gap between the bottom surface of the SIL and the top surface of the rotating media. In the mode-switching servo, it is very important to reduce the initial overshoot in the near field region, as this overshoot can cause collisions between the SIL and the media, and increase the settling time required for the SIL to be initially moved to the final air gap. In this paper, the mode-switching servo with a brake pulse is proposed to reduce the initial overshoot and settling time. The effectiveness of the proposed method is proved by experiments of which results show that the minimum air gap due to the initial overshoot is improved from 6.86 to 18.73 nm and the settling time is reduced from 30 to 4.5 ms.",

author = "Kim, {Jung Gon} and Kang, {Min Seok} and Shin, {Won Ho} and Park, {No Cheol} and Yang, {Hyun Seok} and Park, {Young Pil} and Jinkyung Lee and Ansik Jeong and Jonghyun Shin and Kyunggeun Lee",

year = "2010",

month = jan,

doi = "10.1007/s00542-009-0896-0",

language = "English",

volume = "16",

pages = "309--315",

journal = "Microsystem Technologies",

issn = "0946-7076",

publisher = "Springer Verlag",

number = "1-2",

}

Improved gap servo system using a brake pulse for a SIL-based near-field recording system. / Kim, Jung Gon; Kang, Min Seok; Shin, Won Ho; Park, No Cheol ; Yang, Hyun Seok; Park, Young Pil; Lee, Jinkyung; Jeong, Ansik; Shin, Jonghyun; Lee, Kyunggeun.

In: Microsystem Technologies, Vol. 16, No. 1-2, 01.2010, p. 309-315.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Improved gap servo system using a brake pulse for a SIL-based near-field recording system

AU - Kim, Jung Gon

AU - Kang, Min Seok

AU - Shin, Won Ho

AU - Park, No Cheol

AU - Yang, Hyun Seok

AU - Park, Young Pil

AU - Lee, Jinkyung

AU - Jeong, Ansik

AU - Shin, Jonghyun

AU - Lee, Kyunggeun

PY - 2010/1

Y1 - 2010/1

N2 - A mode-switching servo is widely used in solid immersion lens (SIL)-based near-field recording (NFR) systems to control the air gap between the bottom surface of the SIL and the top surface of the rotating media. In the mode-switching servo, it is very important to reduce the initial overshoot in the near field region, as this overshoot can cause collisions between the SIL and the media, and increase the settling time required for the SIL to be initially moved to the final air gap. In this paper, the mode-switching servo with a brake pulse is proposed to reduce the initial overshoot and settling time. The effectiveness of the proposed method is proved by experiments of which results show that the minimum air gap due to the initial overshoot is improved from 6.86 to 18.73 nm and the settling time is reduced from 30 to 4.5 ms.

AB - A mode-switching servo is widely used in solid immersion lens (SIL)-based near-field recording (NFR) systems to control the air gap between the bottom surface of the SIL and the top surface of the rotating media. In the mode-switching servo, it is very important to reduce the initial overshoot in the near field region, as this overshoot can cause collisions between the SIL and the media, and increase the settling time required for the SIL to be initially moved to the final air gap. In this paper, the mode-switching servo with a brake pulse is proposed to reduce the initial overshoot and settling time. The effectiveness of the proposed method is proved by experiments of which results show that the minimum air gap due to the initial overshoot is improved from 6.86 to 18.73 nm and the settling time is reduced from 30 to 4.5 ms.

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Improved gap servo system using a brake pulse for a SIL-based near-field recording system

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