US 7,572,510 B2
High infrared reflection coatings and associated technologies
Klaus Hartig, Avoca, Wis. (US)
Assigned to Cardinal CG Company, Eden Prairie, Minn. (US)
Filed on Oct. 10, 2006, as Appl. No. 11/545,231.
Claims priority of provisional application 60/725891, filed on Oct. 11, 2005.
Prior Publication US 2007/0082206 A1, Apr. 12, 2007
Int. Cl. B32B 15/04 (2006.01); B32B 17/06 (2006.01)
U.S. Cl. 428—432  [428/428; 428/434] 17 Claims
OG exemplary drawing
 
1. A coated substrate having a major surface bearing a low-emissivity coating, the coating comprising, from said major surface outwardly:
a) a first transparent dielectric film region;
b) a first infrared-reflection film region comprising silver;
c) a second transparent dielectric film region;
d) a second infrared-reflection film region comprising silver;
e) a third transparent dielectric film region;
f) a third infrared-reflection film region comprising silver;
g) a fourth transparent dielectric film region;
wherein the coated substrate is part of a multiple-pane insulating glazing unit that includes another substrate, both substrates being clear glass, wherein the first, second, and third infrared-reflection film regions have a combined thickness of between 420 Å-575 Å, the coating has an emissivity of less than 0.025, and yet said glazing unit has a total visible transmission of greater than 60%, wherein the coated substrate has a spectral transmission curve with a transmission peak that is located within a visible wavelength range, and wherein said spectral transmission curve has a halfwidth of less than 290 nm, the coating having a first reflection-region ratio defined as the thickness of the first infrared-reflective film region divided by the thickness of the second infrared-reflective film region, the coating having a second reflection-region ratio defined as the thickness of the second infrared-reflective film region divided by the thickness of the third infrared-reflective film region, both the first and second reflection-region ratios being less than 0.83, and at least one of the first and second reflection-region ratios being less than 0.80.