TY - GEN
T1 - Effect of relative humidity, disk acceleration, and dwell time on tribocharge build-up at a slider disk interface
AU - Lee, Dae Young
AU - Lee, Jaeho
AU - Hwang, Jungho
AU - Choa, Sung Hoon
N1 - Publisher Copyright:
© 2004 IEEE.
Copyright:
Copyright 2015 Elsevier B.V., All rights reserved.
PY - 2004
Y1 - 2004
N2 - 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.
AB - 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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U2 - 10.1109/APMRC.2004.1521965
DO - 10.1109/APMRC.2004.1521965
M3 - Conference contribution
AN - SCOPUS:84934277625
T3 - Asia-Pacific Magnetic Recording Conference 2004, Digest of APMRC 2004
SP - 89
EP - 90
BT - Asia-Pacific Magnetic Recording Conference 2004, Digest of APMRC 2004
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 2004 Asia-Pacific Magnetic Recording Conference, APMRC 2004
Y2 - 16 August 2004 through 19 August 2004
ER -