Double silver low-emissivity and solar control coatings

Details Double silver low-emissivity and solar control coatings Double silver low-emissivity and solar control coatings

2007-05-07

2009-12-15

Speer, Timothy M (Department: 1794)

Stock material or miscellaneous articles

Composite

Of quartz or glass

C428S469000, C427S404000, C427S419100

Reexamination Certificate

active

07632572

ABSTRACT:
A low-emissivity multilayer coating includes, in order outward from the substrate, a first layer including a layer containing titanium oxide, a layer containing silicon nitride, or a sublayer layer containing titanium oxide in combination with a sublayer containing silicon nitride; a second layer including Ag; a third layer including at least one layer selected from titanium oxide layers and silicon nitride layers; a fourth layer including Ag; and a fifth layer including silicon nitride. The color of the coatings can be varied over a wide range by controlling the thicknesses of the layers of titanium oxide, silicon nitride and Ag. A diffusion barrier of oxidized metal protects relatively thin, high electrical conductivity, pinhole free Ag films grown preferentially on zinc oxide substrates. Oxygen and/or nitrogen in the Ag films improves the thermal and mechanical stability of the Ag. Dividing the first layer of titanium oxide, the Ag layers, and/or the third layer with a sublayer of oxidized metal can provide greater thermal and mechanical stability to the respective layers.

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