Laminated glazing unit having improved interfacial adhesion
First Claim
1. A laminated glazing unit comprising a substrate ply, a substantially transparent coating comprising a film stack on a surface of the substrate ply, and a laminating ply of polymeric material laminated to the surface of the substrate ply over the film stack, wherein the film stack comprises:
- (i) a dielectric film adjacent to the laminating ply, consisting essentially of tantalum pentoxide;
(ii) an film adjacent to the tantalum pentoxide dielectric film, consisting essentially of metal selected from the group consisting of copper and zinc; and
(iii) an electrically conductive film adjacent to and substantially thicker than the adhesion film, consisting essentially of silver metal.
5 Assignments
0 Petitions
Accused Products
Abstract
A glazing unit comprises a substrate ply and a laminating ply laminated to a surface of the substrate ply. A coating on the laminated surface of the substrate ply is a film stack comprising an electrically conductive film of silver metal covered by a tantalum pentoxide dielectric film immediately adjacent the laminating ply. Between the silver film and the tantalum pentoxide film is an adhesion film of metal selected from zinc and copper. Applications include, for example, glazing units for solar load reduction and electrically heated glazing units.
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Citations
14 Claims
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1. A laminated glazing unit comprising a substrate ply, a substantially transparent coating comprising a film stack on a surface of the substrate ply, and a laminating ply of polymeric material laminated to the surface of the substrate ply over the film stack, wherein the film stack comprises:
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(i) a dielectric film adjacent to the laminating ply, consisting essentially of tantalum pentoxide; (ii) an film adjacent to the tantalum pentoxide dielectric film, consisting essentially of metal selected from the group consisting of copper and zinc; and (iii) an electrically conductive film adjacent to and substantially thicker than the adhesion film, consisting essentially of silver metal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A laminated glazing unit comprising a substantially inextensible substrate ply having a surface laminated to a ply of polyvinyl butyral and a substantially transparent, electrically conductive film stack on the surface of the substrate ply, the film stack comprising an electrically conductive film of silver metal sandwiched between a first dielectric film on one side and a tantalum pentoxide dielectric film on the other, and an adhesion film of zinc or copper about 1 to 4 nm thick between the electrically conductive film and the tantalum pentoxide film.
- 11. A laminated glazing unit comprising a glass substrate ply having a surface laminated to a polymeric laminating ply, a substantially transparent solar load reduction coating on the surface of the substrate ply consisting essentially of, in order, a tantalum pentoxide dielectric film adjacent the polymeric laminating ply, an adhesion film of copper or zinc, a first film of silver metal, a second dielectric film, a second film of silver metal, and a third dielectric film adjacent the substrate ply.
Specification