C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
C23C 14/18 (2006.01) B32B 17/06 (2006.01) C03C 17/36 (2006.01) C23C 14/08 (2006.01) G02B 1/10 (2006.01) G02B 1/11 (2006.01)
Patent
CA 2081871
The present invention provides a high transmittance, low emissivity film stack having an overcoat of an oxide of a metal chosen from the group of zinc, tin, indium, or bismuth, or an alloy including one or more of these metals, the oxide being applied in a thickness sufficiently low as to have no significant affect upon the optical properties of the coated substrate. That is, if the overcoat is lost through abrasion or chemical attack, the loss will not significantly affect the optical properties of the coating. The resulting film stack exhibits significantly enhanced durability as compared to a film stack without such an overcoat. In a preferred embodiment, a film stack of the invention includes at least one reflective metal layer, an outer, scratch-resistant: metal oxide overcoat, and a metal oxide layer between the silver layer and the overcoat which is less scratch-resistant than the overcoat.
Bond Robert
O'shaughnessy Roger
Bond Robert
Borden Ladner Gervais Llp
Cardinal Cg Company
O'shaughnessy Roger
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