Multi-layer low emissivity thin film coating
First Claim
1. In a multi-layer thin film for glass and other transparent substrates, the improvement comprising a first metallic oxide layer selected from the group consisting of zinc, tin, titanium, indium/tin and bismuth, a second layer selected from the group consisting of silver and silver alloy, a third layer selected from the group consisting of titanium and stainless steel and a fourth metallic oxide layer having a thickness of at least 100 Angstroms selected from the group consisting of zinc, tin, titanium, indium/tin and bismuth, wherein said thin film exhibits visible light transmittance of at least 50% and emissivity of less than 0.15.
2 Assignments
0 Petitions
Accused Products
Abstract
A multi-layer of thin film for application to a transparent substrate such as glass provides excellent visible light transmission while controlling both near infra-red solar energy and far infra-red reflected energy. The film comprises a layer of sputtered zinc, tin, or bismuth oxide, a layer of sputtered silver or silver alloy, a layer of sputtered titanium or stainless steel and a final layer of zinc, tin, or bismuth oxide. The product exhibits a nominal visible light transmittance of 55% and a reflectance less than about 15% for incident light on the substrate (glass) side at visible light wavelengths and reflectance less than about 6% for incident light on the film side in the visible wavelengths. Emissivity is less than 0.15. A method of fabricating the product is also disclosed.
68 Citations
26 Claims
- 1. In a multi-layer thin film for glass and other transparent substrates, the improvement comprising a first metallic oxide layer selected from the group consisting of zinc, tin, titanium, indium/tin and bismuth, a second layer selected from the group consisting of silver and silver alloy, a third layer selected from the group consisting of titanium and stainless steel and a fourth metallic oxide layer having a thickness of at least 100 Angstroms selected from the group consisting of zinc, tin, titanium, indium/tin and bismuth, wherein said thin film exhibits visible light transmittance of at least 50% and emissivity of less than 0.15.
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11. A radiation controlling thin film disposed on one surface of a transparent substrate, said thin film comprising, in combination,
a first metallic oxide layer selected from the group consisting of zinc, tin, titanium, indium/tin and bismuth, a second metallic layer selected from the group consisting of silver and silver alloy, a third metallic layer selected from the group consisting of stainless steel and titanium, and a fourth metallic oxide layer having a thickness of at least 100 Angstroms selected from the group consisting of zinc, tin, titanium, indium/tin and bismuth, wherein said thin film exhibits visible light transmittance of at least 50% and emissivity of less than 0.15.
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18. An improved radiation controlling product comprising, in combination,
a transparent substrate, a plurality of thin layers disposed on one face of said substrate, said plurality of layers including a first metallic oxide layer selected from the group consisting of zinc, tin, titanium, indium/tin and bismuth, a second metallic layer selected from the group consisting of silver and silver alloys, a third metallic layer selected from the group consisting of stainless steel and titanium and a fourth metallic oxide layer having a thickness of at least 100 Angstroms selected from the group consisting of zinc, tin, titanium, indium/tin and bismuth.
Specification