Patent ID: 6596398
Filing Date: 2003-07-22
Classification: C03C,Y10T

Abstract:
A tin oxide coated, solar control glass having low haze of less than about 2.0% and having a NIR solar absorbing layer and a low emissivity layer within said tin oxide coating, comprising a glass substrate and a doped tin oxide coating having at least two layers with one layer being a solar absorbing layer comprising SnO2 containing a dopant selected from the group consisting of antimony, tungsten, vanadium, iron, chromium, molybdenum, niobium, cobalt, nickel and mixtures thereof and another layer being a low emissivity layer comprising SnO2 containing a dopant of fluorine or phosphorous and, wherein a portion of said solar absorbing layer contains fluorine in sufficient quantity to reduce the rugosity and haze for said tin oxide coating and wherein the thickness of the NIR solar absorbing layer is from 200 to 320 nanometers (nm) and the thickness of the low emissivity layer is from 200 to 450 nm and the portion of said solar absorbing layer containing fluorine to reduce the rugosity comprises from 300 Angstroms (Ã¥) to 600 Ã¥ of the thickness of the solar absorbing layer and is located either adjacent to the interface between the solar absorbing layer and the low emissivity layer, or is the portion of the solar absorbing layer that is closest to the glass substrate.