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Antireflection filter

  • US 5,763,061 A
  • Filed: 06/14/1996
  • Issued: 06/09/1998
  • Est. Priority Date: 06/15/1995
  • Status: Expired due to Term
First Claim
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1. An antireflection filter comprising a transparent substrate in the form of a film or sheet, an antireflection coating on at least one surface of said substrate, which coating comprises an inorganic compound, and a stain proofing layer having a thickness of 0.001 to 0.03 μ

  • m on said antireflection coating, which layer comprises a silane compound having a number average molecular weight of 5×

    102 to 1×

    105 represented by the formula (I);

    ##STR4## wherein Rf is a straight or branched perfluoroalkyl group having 1 to 16 carbon atoms, X is an iodine atom or a hydrogen atom, Y is a hydrogen atom or a C1-5 alkyl group, Z is a fluorine atom or a trifluoromethyl group, R1 is a hydrolyzable group, R2 is a hydrogen atom or an inactive monovalent organic group, a, b, c and d are the same or different and each an integer of 0 to 200, e is 0 or 1, m and n are the same or different and each 0, 1 or 2, and p is an integer of 1 to 10.

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