Patent ID: 6410173
Filing Date: 2002-06-25
Classification: C03C,C23C,G02B,Y10T

Abstract:
A sol-gel derived multilayer antireflection coating for use in coating a heat treatable inorganic substrate comprising:(a) an inner layer for contact with an inorganic substrate having at least two different metallic oxides and which provides an index of refraction of from about 1.54 to about 1.90 after curing; (b) a middle layer on the inner layer comprising an oxide of zirconium and which provides an index of refraction of at least about 1.90 after curing; and (c) an outer layer on the middle layer comprising at least one metallic oxide and which provides an index of refraction of about 1.54 or less after curing and wherein optical properties of the sol-gel derived multilayer antireflection coating are substantially retained after the multilayer antireflection coating is applied to an inorganic substrate and subsequently subjected to a heat treatment.