Low-E glass coating system and insulating glass units made therefrom
First Claim
Patent Images
1. A sputter-coated glass article comprised of a glass substrate having thereon from the glass outwardly, a layer system including:
- a) a layer of Si3 N4 having a thickness of about 450 Å
-600 Å
;
b) a layer of nickel or nichrome having a thickness of about 7 Å
or less;
c) a layer of silver having a thickness of about 115 Å
-190 Å
;
d) a layer of nickel or nichrome having a thickness of about 7 Å
or less; and
e) a layer of Si3 N4 having a thickness of about 580 Å
-800 Å and
,when said glass substrate has a thickness of about 2 mm-6 mm, said coated glass substrate has a visible transmittance of at least about 70%, a normal emissivity (En) of less than about 0.07, a hemispherical emissivity (Eh) of less than about 0.075, a sheet resistance (Rs) of less than about 5.5 ohms/sq. and having the following reflectance and color coordinates wherein the glass side characteristics are;
RG Y is about 12 to 19ah is about -3 to +3bh is about -5 to -20and wherein the film side characteristics are;
RF Y is about 8 to 12ah is about 0 to +6bh is about -5 to -30wherein RY is the reflectance and ah, bh are the color coordinates as measured in Hunter units, Ill., C., 10°
observer.
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Accused Products
Abstract
A sputter-coated glass layer system particularly useful in insulating glass units ("IGs"), which includes a single layer of silver having a thickness of about 115 Å -190 Å located between two layers of nickel or nichrome having a thickness of 7 Å or less, and provided with an undercoat and an overcoat of Si3 N4 having thicknesses of about 450 Å-600 Å and about 580 Å-800 Å respectively, such that a glass so coated achieves normal emissivity values (En '"'"'s) of less than about 0.07 and good durability without acquiring a mirror-like and highly purple appearance.
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Citations
15 Claims
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1. A sputter-coated glass article comprised of a glass substrate having thereon from the glass outwardly, a layer system including:
-
a) a layer of Si3 N4 having a thickness of about 450 Å
-600 Å
;b) a layer of nickel or nichrome having a thickness of about 7 Å
or less;c) a layer of silver having a thickness of about 115 Å
-190 Å
;d) a layer of nickel or nichrome having a thickness of about 7 Å
or less; ande) a layer of Si3 N4 having a thickness of about 580 Å
-800 Å and
,when said glass substrate has a thickness of about 2 mm-6 mm, said coated glass substrate has a visible transmittance of at least about 70%, a normal emissivity (En) of less than about 0.07, a hemispherical emissivity (Eh) of less than about 0.075, a sheet resistance (Rs) of less than about 5.5 ohms/sq. and having the following reflectance and color coordinates wherein the glass side characteristics are; RG Y is about 12 to 19 ah is about -3 to +3 bh is about -5 to -20 and wherein the film side characteristics are; RF Y is about 8 to 12 ah is about 0 to +6 bh is about -5 to -30 wherein RY is the reflectance and ah, bh are the color coordinates as measured in Hunter units, Ill., C., 10°
observer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification