Abrasion-Resistant and Scratch-Resistant Coatings Having a Low Index of Refraction on a Substrate
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United States of America Patent
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Issued Date -
Oct 23, 2008
app pub date -
Jun 7, 2005
filing date -
Jun 8, 2004
priority date (Note) -
Abandoned
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Abstract
Disclosed is a substrate with an abrasion resistant and scratch-resistant coating that has a low index of refraction and comprises magnesium fluoride and at least one metal oxide or semimetal oxide. The coating can be obtained by applying a coating composition containing magnesium fluoride or a precursor thereof and at least one metal oxide or semimetal oxide, or a precursor thereof onto a substrate and then subjecting the same to a thermal treatment. The inventive coating is suitable for optical layers, particularly on translucent substrates. Examples of adequate uses include antireflection layers and interference layer assemblies.
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