Laser texturing of glass disk substrates

Author

Tam, A.C. ; Brannon, J. ; Baumgart, P. ; Pour, I.K.

Author_Institution

IBM Corp., San Jose, CA, USA

Volume

33

Issue

5

fYear

1997

fDate

9/1/1997 12:00:00 AM

Firstpage

3181

Lastpage

3183

Abstract

Infrared laser pulses of microsecond duration derived from a stabilized carbon dioxide laser are used to produce a textured zone on a glass disk substrate. Each laser pulse can produce a microscopically smooth dome-shaped bump that protrudes from the initial disk surface. Typical bump heights of interest are 20-30 nm with bump diameters ~10 μm. The laser-textured zone, composed of ~10⁵ bumps, provides a dedicated region for contact start/stop. The zone exhibits excellent tribological properties (stiction and durability)

Keywords

carbon compounds; gas lasers; glass; hard discs; laser materials processing; magnetic recording; surface texture; surface treatment; tribology; 10 mum; 20 to 30 nm; bump diameters; bump heights; contact start/stop; durability; glass disk substrates; hard disk drives; infrared laser pulses; laser texturing; microscopically smooth dome-shaped bump; microsecond duration pulses; stabilized CO₂ laser; stiction; textured zone; tribological properties; Atomic force microscopy; Carbon dioxide; Glass; Laser beams; Laser stability; Microscopy; Optical attenuators; Optical pulses; Optical surface waves; Substrates; Surface emitting lasers; Surface topography; Writing;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.617884

Filename

617884