Head and media design considerations for reducing thermal asperity

Citation
V. Sharma et al., Head and media design considerations for reducing thermal asperity, TRIBOL INT, 34(5), 2001, pp. 307-314
Citations number
12
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Mechanical Engineering
Journal title
TRIBOLOGY INTERNATIONAL
ISSN journal
0301-679X → ACNP
Volume
34
Issue
5
Year of publication
2001
Pages
307 - 314
Database
ISI
SICI code
0301-679X(200105)34:5<307:HAMDCF>2.0.ZU;2-E
Abstract
Recent use of magnetoresistive (MR)/giant-magnetoresistive (GMR) heads in d isk drives requires tighter control on particle contamination that may gene rate thermal asperities at the head/disk interface. In this study, the effe cts of slider air bearing surface (ABS) design and media on TA reduction ca pability are investigated. The motion of particles at the head/media interf ace is simulated numerically. Drive level TA tests are performed using a pa rticle injection chamber. It is observed that a new ABS design, that has an aerodynamic U-shaped rail and a central airflow passage, is beneficial in reducing the particle contamination on the slider. Scratch-resistance of th e media surface is correlated to TA reduction capability of the media; more scratch-resistant media produced less TA. On the other hand, the adhesion properties of the media have minor effects on TA reduction, as the particle s that usually generate TA in a drive are too small to spin off the media. (C) 2001 Elsevier Science Ltd. All rights reserved.