Method of making a flexible substrate containing self-assembling microstructures
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United States of America Patent
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app pub date -
Apr 24, 2006
filing date -
Nov 21, 2000
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Abstract
A substrate has embossed thereon a plurality of shaped recesses of a predetermined precise geometric profile, each recess having a flat bottom surface having a major dimension of about 1000 .mu.m or less, the substrate being capable of undergoing a thermal cycle of about one hour at about 150.degree. C. while maintaining about .+-.10 .mu.m or less dimensional stability of the embossed shaped indentations, and wherein the substrate comprises an amorphous thermoplastic material. During the thermal cycle the substrate has an elastic modulus greater than about 10.sup.10 dynes/cm.sup.2 and a viscoelastic index of less than about 0.1.
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