Method for producing a glass substrate for a magnetic disk
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United States of America Patent
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Feb 16, 1999
Grant Date -
N/A
app pub date -
Dec 2, 1996
filing date -
Mar 30, 1995
priority date (Note) -
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status (Latency Note)
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Abstract
To reduce occurrence of flaws in a polishing process by preventing an abrasive grain or metallic particles deposited on the surface of a glass substrate for a magnetic disk in a lapping process from entering into the subsequent polishing process. A lapping process for the main surface is a glass substrate for a magnetic disk is conducted; an etching process for the main surface of the glass substrate is conducted to the extent of a depth of 0.1 .mu.m to 3 .mu.m, followed by conducting a polishing process for the main surface of the glass substrate where the etching process has been conducted.
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