The effects of slider design on thermal asperity rejection capability

Citation
V. Sharma et al., The effects of slider design on thermal asperity rejection capability, KSME INT J, 15(3), 2001, pp. 281-290
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
KSME INTERNATIONAL JOURNAL
ISSN journal
1226-4865 → ACNP
Volume
15
Issue
3
Year of publication
2001
Pages
281 - 290
Database
ISI
SICI code
1226-4865(200103)15:3<281:TEOSDO>2.0.ZU;2-C
Abstract
Particle contamination has been an ongoing problem affecting the reliabilit y of the magnetic hard disk drives. Especially the recent use of MR head re quires much tighter control of particle contamination due to thermal asperi ty (TA) phenomenon. In this study, the effects of slider air bearing surfac e design on TA reduction capability were investigated by manufacturing two types of sliders. Numerical methods were used to simulate the motion of par ticles in the head/media interface. Experiments were conducted to verify th e results predicted by the numerical simulation. Drives were built and expo sed to particle contamination using a particle injection chamber, which tur ned out to be a very simple and reliable particle generation method over co nventional aerosol technique. Then the number of TA generated in the drives was recorded and compared. Also the contacts between slider and particles were investigated by acoustic emission study. It was found that a new ABS d esign, which has aerodynamic U-shaped rail and central flow passage, was be neficial in reducing the particle contamination on the slider.