Coated article with low-E coating having zinc stannate based layer between IR reflecting layers for reduced mottling and corresponding method
AssigneesCentre Luxembourgeois de Recherches pour le Verre et la Ceramique S.A. (C.R.V.C.), Guardian Industries Corp.
InventorsJose Ferreira, Pierrot Pallotta, Richard Blacker, Muhammad Imran
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Abstract
A coated article is provided which may be heat treated (e.g., thermally tempered) and/or heat bent in certain example instances. In certain example embodiments, a zinc stannate based layer is provided between a tin oxide based layer and a silicon nitride based layer, and this has been found to significantly reduce undesirable mottling damage upon heat treatment/bending. This results in significantly improved bendability of the coated article in applications such as vehicle windshields and the like.
Claims23
A method of making a vehicle windshield, the method comprising:
- having or providing a coating on a glass substrate, the coating comprising first and second layers comprising silver with at least the following layers therebetween moving away from the glass substrate:
- a contact layer over and contacting the first layer comprising silver, a layer comprising tin oxide over at least the contact layer, a layer comprising zinc stannate over and contacting the layer comprising tin oxide, a layer comprising silicon nitride over at least the layer comprising zinc stannate, and a layer comprising zinc oxide over at least the layer comprising silicon nitride;
- and
- heat bending the glass substrate with the coating thereon to an extent so as to have a centerline convex value “x” of at least about 28 mm without experiencing significant mottling damage due to the heat bending.
A method of making a coated article, the method comprising:
- heat treating a glass substrate with a coating thereon, the coating comprising first and second layers comprising silver with at least a layer comprising zinc stannate therebetween, wherein the layer comprising zinc stannate is provided between at least a layer comprising tin oxide and a layer comprising silicon nitride, wherein the layer comprising zinc stannate is located over and contacting the layer comprising tin oxide;
- and
- heat bending the glass substrate with the coating thereon without experiencing significant mottling damage due to the heat bending.
Dependencies are inferred from the claim text.