Tribology of laser textured disks with thin overcoat

Author

Wang, Run-Han ; Raman, Vedantham ; Baumgart, Peter ; Spool, Alan M. ; Deline, Vaughn

Author_Institution

Res. Div., IBM Corp., San Jose, CA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3184

Lastpage

3186

Abstract

The adoption of dual zone texturing on magnetic disks allows the flying height of the head to be reduced over the data zone compared to a fully textured disk. Laser texture offers a technique far precise topography control and the placement of the landing zone. In this study the effects of the clearance between the head and the disk, and the presence or absence of overcoat on the air bearing surface on contact start-stop performance are evaluated. The wear mechanism of the laser bump by the head was investigated with in situ monitors and followed by surface analysis. Acceptable durability and stiction performance for contact start-stop operation is feasible with a few nm of clearance

Keywords

acoustic emission testing; atomic force microscopy; hard discs; laser materials processing; magnetic heads; magnetic recording; scanning electron microscopy; surface texture; surface treatment; time of flight mass spectra; wear resistant coatings; wear testing; AFM; SEM; TOFMS; acoustic sensors; air bearing surface; contact start-stop performance; dual zone texturing; durability performance; flying height; head-disk clearance; in situ monitors; landing zone placement; laser bump; laser textured disks; magnetic disks; magnetic sensors; optical sensors; stiction performance; surface analysis; thin overcoat; topography control; tribology; wear mechanism; Atomic force microscopy; Burnishing; Cascading style sheets; Chromium; Friction; Lubricants; Magnetic heads; Optical control; Scanning electron microscopy; Strain measurement; Surface emitting lasers; Surface topography; Testing; Tribology;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617885

Filename

617885