Patent ID: 7655313
Filing Date: 2010-02-02
Classification: C03C,Y10T

Abstract:
1. An insulating glass (IG) window unit comprising: first and second glass substrates coupled to each other proximate their respective edges so as to form an insulating space therebetween; a layer system supported by one of the glass substrates proximate the insulating space, said layer system comprising an infrared (IR) reflecting layer comprising silver located between at least first and second dielectric layers which are silicon nitride inclusive layers, wherein said layer system includes only one IR reflecting layer comprising silver; wherein the IG window unit has a visible transmission (T wherein said layer system comprises the following recited layers with the following thickness ranges: first silicon nitride inclusive layer: 230-320 Å thick first Ni and/or NiCr inclusive layer: 10-40 Å thick the IR reflecting layer comprising silver: 125-180 Å thick second Ni and/or NiCr inclusive layer: 10-40 Å thick second silicon nitride inclusive layer: 450-560 Å thick; wherein the first silicon nitride inclusive layer is located between the glass substrate and the first Ni and/or NiCr inclusive layer.