Controlled laser texturing glass-ceramic substrates for magnetic recording media
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United States of America Patent
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Dec 29, 1998
Grant Date -
N/A
app pub date -
Jun 23, 1997
filing date -
Jun 23, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The height of protrusions formed during laser texturing a glass-ceramic substrate is controlled by controlling the amount of the crystalline-phase of the substrate, to less than 70% by volume. In an embodiment, the amount of crystalline-phase is controlled by heating under controlled conditions to convert a glass substrate into the glass-ceramic substrate comprising a controlled amount of crystalline phase.
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