Method for selecting a material suitable for a substrate for inf

Details Method for selecting a material suitable for a substrate for inf Method for selecting a material suitable for a substrate for inf

1997-09-04

1999-11-09

Kiliman, Leszek

Stock material or miscellaneous articles

Circular sheet or circular blank

Recording medium or carrier

428 653, 428336, 428424, 428432, 428694ST, 428694SG, 428900, 427129, 501 11, 501 53, G11B 566

Patent

active

059810157

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).

REFERENCES:
patent: 4617817 (1986-10-01), Gegel
patent: 4789875 (1988-12-01), Wakabayashi
patent: 5391522 (1995-02-01), Goto et al.
patent: 5476821 (1995-12-01), Beall
patent: 5624719 (1997-04-01), Tanabe
patent: 5744208 (1998-04-01), Beall
patent: 5874376 (1999-02-01), Taguchi

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