METHOD OF MANUFACTURING A SUBSTRATE FOR A MAGNETIC DISK
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United States of America Patent
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Issued Date -
Sep 30, 2010
app pub date -
Mar 29, 2010
filing date -
Mar 30, 2009
priority date (Note) -
Abandoned
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Abstract
A magnetic disk substrate manufacturing method of this invention includes a main surface polishing process that polishes disk-shaped glass substrates by the use of a polishing machine having a carrier pressed between a pair of polishing surface plates and adapted to make an orbital motion while rotating on its axis in a state of holding the disk-shaped glass substrates. In the polishing machine, the carrier is placed in a state where a plate-like member is disposed on one side of main surfaces of the disk-shaped glass substrate, so that only the other side of the main surfaces of the disk-shaped glass substrate is polished while allowing the one side of the main surfaces of the disk-shaped glass substrates to be a non-polishing main surface.
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