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Data storage medium and method for the preparation thereof

  • US 20040063031A1
  • Filed: 08/07/2003
  • Published: 04/01/2004
  • Est. Priority Date: 08/23/2002
  • Status: Active Grant
First Claim
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1. A data storage medium, comprising:

  • a substrate comprising an amorphous thermoplastic resin having a heat distortion temperature of at least about 140°

    C. measured at 66 pounds per square inch according to ASTM D648, a density less than 1.7 grams per milliliter, and an organic volatiles content less than 1,000 parts per million measured according to ASTM D4526;

    a reflective metal layer; and

    a haze-prevention layer interposed between the substrate and the reflective metal layer, wherein the haze-prevention layer comprises a material having a volume resistivity of at least 1×

    10

    4
    ohm-centimeters measured according to ASTM D257 at 25°

    C. and a tensile modulus of at least about 3×

    105 pounds per square inch measured according to ASTM D638 at 25°

    C.

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