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

Bibliographical note

Funding Information:
This work was funded by the Korea Science and Engineering Foundation (KOSEF) through the Center for Information Storage Mechatronics (CISM) Grant No. R17-2008-040-01001-0. We would like to acknowledge that Samsung Corporations have kindly provided us with technical supports on our experiments.

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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10.1007/s00542-009-0896-0

Cite this

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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",

note = "Funding Information: This work was funded by the Korea Science and Engineering Foundation (KOSEF) through the Center for Information Storage Mechatronics (CISM) Grant No. R17-2008-040-01001-0. We would like to acknowledge that Samsung Corporations have kindly provided us with technical supports on our experiments.",

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

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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

N1 - Funding Information: This work was funded by the Korea Science and Engineering Foundation (KOSEF) through the Center for Information Storage Mechatronics (CISM) Grant No. R17-2008-040-01001-0. We would like to acknowledge that Samsung Corporations have kindly provided us with technical supports on our experiments.

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

Abstract

Bibliographical note

All Science Journal Classification (ASJC) codes

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