Laser removal of particles from magnetic head sliders

Yongfeng Lu, W. D. Song, M. H. Hong, B. S. Teo, T. C. Chong, T. S. Low

Research output: Contribution to journalArticle

84 Citations (Scopus)

Abstract

A quantitative investigation of laser-induced removal of particles from magnetic head slider surfaces has been carried out. The damage thresholds of magnetic head sliders for laser fluence and pulse number were found to be about 150 mJ/cm 2 and 5000 pulses at 100 mJ/cm 2 , respectively. For laser fluence or pulse number above the damage threshold, laser irradiation onto magnetic head slider surfaces can cause microcracks around the pole tips. It is found that laser cleaning efficiency increases with increasing laser fluence and pulse number, but does not depend on repetition rate up to 30 Hz. Laser cleaning efficiency of removing particles from magnetic head slider surfaces can reach about 90% for Al particles and 100% for Sn particles, respectively, under appropriate conditions without causing damage. The mechanisms of laser cleaning of particles from magnetic head slider are laser-induced surface vibration, particle vibration, particle thermal expansion, and ablation with high laser fluence, which produce forces strong enough to detach particles from slider surfaces. Based on the above cleaning mechanisms, the dependence of laser cleaning efficiency on laser parameters can be explained.

Original languageEnglish (US)
Pages (from-to)499-504
Number of pages6
JournalJournal of Applied Physics
Volume80
Issue number1
DOIs
StatePublished - Jul 1 1996

Fingerprint

lasers
chutes
cleaning
fluence
yield point
pulses
vibration
microcracks
ablation
thermal expansion
repetition
poles
damage
irradiation
causes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Lu, Y., Song, W. D., Hong, M. H., Teo, B. S., Chong, T. C., & Low, T. S. (1996). Laser removal of particles from magnetic head sliders. Journal of Applied Physics, 80(1), 499-504. https://doi.org/10.1063/1.362754

Laser removal of particles from magnetic head sliders. / Lu, Yongfeng; Song, W. D.; Hong, M. H.; Teo, B. S.; Chong, T. C.; Low, T. S.

In: Journal of Applied Physics, Vol. 80, No. 1, 01.07.1996, p. 499-504.

Research output: Contribution to journalArticle

Lu, Y, Song, WD, Hong, MH, Teo, BS, Chong, TC & Low, TS 1996, 'Laser removal of particles from magnetic head sliders', Journal of Applied Physics, vol. 80, no. 1, pp. 499-504. https://doi.org/10.1063/1.362754
Lu, Yongfeng ; Song, W. D. ; Hong, M. H. ; Teo, B. S. ; Chong, T. C. ; Low, T. S. / Laser removal of particles from magnetic head sliders. In: Journal of Applied Physics. 1996 ; Vol. 80, No. 1. pp. 499-504.
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