Method of laser texturing glass or glass-ceramic substrates for magnetic recording media
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United States of America Patent
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Feb 3, 1998
Grant Date -
N/A
app pub date -
Feb 6, 1997
filing date -
Feb 7, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The height of protrusions formed during laser texturing a glass or glass-ceramic substrate is controlled by controlling the quench rate of the protrusions during resolidification. In an embodiment, the quench rate is controlled by heating the substrate during laser texturing. Heating can be initiated prior or subsequent to, or simultaneously with, initial exposure of the substrate surface to a pulsed, focused CO.sub.2 laser beam for texturing.
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