Patent ID: 8197892

Claim:
A method of making a laminated article, comprising: forming a functional coating over at least a portion of a first major surface of a substrate, wherein the functional coating comprises a multilayer coating comprising at least one infrared reflective metal film with multiple metal oxide films; forming a protective coating over at least a portion of the functional coating, wherein the protective coating consists of a single layer consisting of a mixture of silica and alumina having at least 80 wt. % silica, wherein the protective coating has a thickness in the range of 300 Å to 5 microns, and wherein the functional coating and the protective coating define a coating stack; providing a second substrate; and providing a polymeric material between the protective coating and the second substrate, wherein the protective coating has a refractive index in the range of ±0.2 with respect to the refractive index of the polymeric material.