Title :
Issues on high-speed laser zone texturing of magnetic disk substrates with improved quality
Author :
Park, Hee K. ; Kerstens, Pieter J M ; Baumgart, Peter ; Tam, Andrew C.
Author_Institution :
IBM Manuf. Technol. Center, Boca Raton, FL, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
Important issues of laser zone texturing in manufacturing are discussed. We report practical strategies in terms of tooling and process control. We found that good bump height uniformity is achieved by operating in the most stable region where the effects of laser pulse energy fluctuation, disk thickness variation, and disk runout are minimized. By selecting optimum process parameters, a bump height standard deviation of less than 1.5% can be achieved
Keywords :
laser materials processing; magnetic disc storage; surface texture; surface topography; surface treatment; bump height standard deviation; bump height uniformity; disk runout; disk thickness; high-speed laser zone texturing; laser pulse energy fluctuation; magnetic disk substrates; manufacturing; process control; tooling; Laser beams; Laser stability; Laser theory; Manufacturing processes; Optical pulses; Process control; Production; Space vector pulse width modulation; Surface emitting lasers; Throughput;
Journal_Title :
Magnetics, IEEE Transactions on
