Title :
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
fDate :
9/1/1997 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
