Method for selecting a material suitable for a substrate for information recording media, material selected using this method, and magnetic disk formed using this material
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United States of America Patent
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Nov 9, 1999
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N/A
app pub date -
Sep 4, 1997
filing date -
Sep 4, 1996
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Abstract
A method for seeking, from an outer circle radius a, an inner circle radius b, and a thickness h of a disc substrate and a deflection Wmax permissive at a time of rotation, a specific elastic modulus G that a material forming the substrate has, ##EQU1## The material for providing a substrate for information recording media having a thickness h of 0.6 millimeter and a deflection Wmax of 1.4 micrometer has a specific elastic modulus G satisfying above Formula (1).
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