ANTIREFLECTION COATINGS
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United States of America Patent
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Issued Date -
Jun 26, 2014
app pub date -
Dec 21, 2012
filing date -
Dec 21, 2012
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Abandoned
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Abstract
Fluorine-doped antireflection coatings, methods for preparing the coatings and articles comprising the coatings are disclosed. The fluorine-doped antireflection coating comprises a fluorine-doped xerogel coating disposed on a substrate. The index of refraction of the xerogel coating is less than the index of refraction of the substrate, generally between about 1.15 and about 1.45. The fluorine atoms can be distributed uniformly through the thickness of the coating, disposed at the surface of the coating, or the distribution can be graded from the surface through the thickness of the coating. The methods comprise applying a coating precursor solution comprising a sol-gel precursor to a glass substrate, heating the coating to form a xerogel coating, and fluorine-doping the coating. The fluorine-doping can be performed by utilizing a coating precursor solution comprising a first fluorine source, contacting the cured coating with a second fluorine source, or a combination thereof.
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