Effect of relative humidity, disk acceleration, and dwell time on tribocharge build-up at a slider disk interface

Dae Young Lee, Jaeho Lee, Jungho Hwang, Sung Hoon Choa

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

High performance disk drives require high spindle speed. The spindle speed of typical hard disk drives has increased in recent years. The increasing disk velocity leads to increasing disk acceleration and slider-disk interaction. The slider-disk interaction in CSS (contact-start-stop) mode is an important source of particle generation and tribocharge. Charge build-up in the slider-disk interface can cause ESD (electrostatic discharge) damage and lubricant decomposition. We measured the tribocurrent/voltage build-up generated at increasing disk acceleration. In addition, we examined the effects of relative humidity and dwell time on the tribocharge build-up. We found that the tribocurrent/voltage was generated during picoslider/ disk interaction and its level was about 3-16 pA and 0.1-0.3 V, respectively. Tribocurrent/voltage build-up was reduced with increasing disk acceleration. Higher humidity conditions (75 - 80%) yielded lower levels of tribovoltage/current. Dwell time affected the charge build-up at the slider-disk interface. The degree of tribocharge build-up increased with increasing dwell time.

Original languageEnglish
Title of host publicationAsia-Pacific Magnetic Recording Conference 2004, Digest of APMRC 2004
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages89-90
Number of pages2
ISBN (Electronic)0780387171, 9780780387171
DOIs
Publication statusPublished - 2004 Jan 1
Event2004 Asia-Pacific Magnetic Recording Conference, APMRC 2004 - Seoul, Korea, Republic of
Duration: 2004 Aug 162004 Aug 19

Other

Other2004 Asia-Pacific Magnetic Recording Conference, APMRC 2004
CountryKorea, Republic of
CitySeoul
Period04/8/1604/8/19

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Atmospheric humidity
Electric potential
Electrostatic discharge
Hard disk storage
Lubricants
Decomposition

All Science Journal Classification (ASJC) codes

  • Electrical and Electronic Engineering

Cite this

Lee, D. Y., Lee, J., Hwang, J., & Choa, S. H. (2004). Effect of relative humidity, disk acceleration, and dwell time on tribocharge build-up at a slider disk interface. In Asia-Pacific Magnetic Recording Conference 2004, Digest of APMRC 2004 (pp. 89-90). [1521965] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/APMRC.2004.1521965
Lee, Dae Young ; Lee, Jaeho ; Hwang, Jungho ; Choa, Sung Hoon. / Effect of relative humidity, disk acceleration, and dwell time on tribocharge build-up at a slider disk interface. Asia-Pacific Magnetic Recording Conference 2004, Digest of APMRC 2004. Institute of Electrical and Electronics Engineers Inc., 2004. pp. 89-90
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abstract = "High performance disk drives require high spindle speed. The spindle speed of typical hard disk drives has increased in recent years. The increasing disk velocity leads to increasing disk acceleration and slider-disk interaction. The slider-disk interaction in CSS (contact-start-stop) mode is an important source of particle generation and tribocharge. Charge build-up in the slider-disk interface can cause ESD (electrostatic discharge) damage and lubricant decomposition. We measured the tribocurrent/voltage build-up generated at increasing disk acceleration. In addition, we examined the effects of relative humidity and dwell time on the tribocharge build-up. We found that the tribocurrent/voltage was generated during picoslider/ disk interaction and its level was about 3-16 pA and 0.1-0.3 V, respectively. Tribocurrent/voltage build-up was reduced with increasing disk acceleration. Higher humidity conditions (75 - 80{\%}) yielded lower levels of tribovoltage/current. Dwell time affected the charge build-up at the slider-disk interface. The degree of tribocharge build-up increased with increasing dwell time.",
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Lee, DY, Lee, J, Hwang, J & Choa, SH 2004, Effect of relative humidity, disk acceleration, and dwell time on tribocharge build-up at a slider disk interface. in Asia-Pacific Magnetic Recording Conference 2004, Digest of APMRC 2004., 1521965, Institute of Electrical and Electronics Engineers Inc., pp. 89-90, 2004 Asia-Pacific Magnetic Recording Conference, APMRC 2004, Seoul, Korea, Republic of, 04/8/16. https://doi.org/10.1109/APMRC.2004.1521965

Effect of relative humidity, disk acceleration, and dwell time on tribocharge build-up at a slider disk interface. / Lee, Dae Young; Lee, Jaeho; Hwang, Jungho; Choa, Sung Hoon.

Asia-Pacific Magnetic Recording Conference 2004, Digest of APMRC 2004. Institute of Electrical and Electronics Engineers Inc., 2004. p. 89-90 1521965.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Lee DY, Lee J, Hwang J, Choa SH. Effect of relative humidity, disk acceleration, and dwell time on tribocharge build-up at a slider disk interface. In Asia-Pacific Magnetic Recording Conference 2004, Digest of APMRC 2004. Institute of Electrical and Electronics Engineers Inc. 2004. p. 89-90. 1521965 https://doi.org/10.1109/APMRC.2004.1521965