Coated glazing material

Details Coated glazing material Coated glazing material

1989-12-28

1992-10-06

Herbert, Jr., Thomas J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428336, 428469, B32B 702, B32B 1504

Patent

active

051530546

ABSTRACT:
A substrate of glazing material carries a multi-layer coating which comprises a reflective layer of silver sandwiched between a transparent undercoat and a transparent overcoat. The undercoat for the silver layer comprises at least one layer of a metal oxide. The overcoat for the silver layer comprises a layer of an oxide of a sacrificial metal selected from the group consisting of titanium, aluminum, stainless steel, bismuth, tin and mixtures of two or more thereof, which is formed by initial deposition of the sacrificial metal and its conversion to oxide over which is deposited a layer of zinc oxide having a thickness not greater than 15 nm, and an uppermost overcoating layer of metal oxide selected from the group consisting of tin oxide, bismuth oxide, aluminum oxide, titanium dioxide and mixtures of two or more thereof. For forming a low emissivity coating with good light transmission, the silver layer is 8 to 12 nm thick. A specific multi-layer low emissivity coating is formed by depositing the following layers, starting from the substrate surface:

REFERENCES:
patent: 4428810 (1984-01-01), Webb et al.
patent: 4790922 (1988-12-01), Huffer

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