Texture measuring method of a hard disk plate
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United States of America Patent
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Jul 3, 2001
Grant Date -
N/A
app pub date -
Mar 8, 1999
filing date -
Mar 9, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention provides a texture measuring method of a hard disk plate. The method comprises performing a laser etching process to form a pinhole at each of a plurality of predetermined positions in a predetermined area on the hard disk plate, measuring the pinhole at each of the predetermined positions to obtain a first measurement value, performing a mechanical texturing process on the predetermined area of the hard disk plate to form circular textures on the predetermined area, and measuring the pinhole at each of the predetermined positions to obtain a second measurement value wherein the first and second measurement values are used to determine the extent of texturing performed on the predetermined area of the hard disk plate.
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