Data storage medium and method for the preparation thereof
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United States of America Patent
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-
Nov 27, 2007
Grant Date -
Apr 1, 2004
app pub date -
Aug 7, 2003
filing date -
Aug 23, 2002
priority date (Note) -
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status (Latency Note)
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Abstract
A data storage medium includes a substrate, a reflective metal layer, and a haze-prevention layer between the substrate and the reflective metal layer. The substrate includes an amorphous thermoplastic resin having a heat distortion temperature of at least about 140.degree. C., 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. The haze-prevention layer includes a material having a volume resistivity of at least 1.times.10.sup.-4 ohm-centimeters and a tensile modulus of at least about 3.times.10.sup.5 pounds per square inch. The data storage medium resists hazing of the reflective layer at elevated temperatures.
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