Haze-resistant transparent film stacks
First Claim
1. A haze-resistant temperable coating carried by a substrate having a surface, comprising, from the substrate surface outwardly:
- a) an inner dielectric layer;
b) a first infrared reflective layer;
c) an intermediate dielectric stack comprising at least three intermediate dielectric layers, each of which have a physical thickness of no more than about 250 A, each of said intermediate dielectric layers having a different microstructure from each dielectric layer contiguous thereto to limit crystal growth therebetween during tempering;
d) a second infrared reflective layer; and
e) an outer dielectric layer.
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Accused Products
Abstract
The invention provides a haze-resistant temperable coating which desirably includes an inner dielectric layer, a first silver layer; an intermediate dielectric stack a second silver layer, and an outer dielectric layer. The intermediate dielectric stack may have alternating layers of a first dielectric and a second dielectric, with each of the alternating layers having an optical thickness of no more than about 450 A or a physical thickness of no more than about 250 A. In a preferred coating, the first dielectric has an index of refraction between about 90% and 110% of that of the second dielectric and the first and second dielectric have different microstructures to limit crystal growth therebetween during tempering.
116 Citations
45 Claims
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1. A haze-resistant temperable coating carried by a substrate having a surface, comprising, from the substrate surface outwardly:
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a) an inner dielectric layer;
b) a first infrared reflective layer;
c) an intermediate dielectric stack comprising at least three intermediate dielectric layers, each of which have a physical thickness of no more than about 250 A, each of said intermediate dielectric layers having a different microstructure from each dielectric layer contiguous thereto to limit crystal growth therebetween during tempering;
d) a second infrared reflective layer; and
e) an outer dielectric layer. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 37, 38, 39)
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12. A haze-resistant temperable coating carried by a substrate having a surface, comprising, from the substrate surface outwardly:
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a) an inner dielectric layer;
b) a first infrared reflective layer;
c) an intermediate dielectric stack comprising alternating layers of a first dielectric and a second dielectric, each of said alternating layers having an optical thickness of no more than about 450 Å
, the first dielectric having an index of refraction between about 90% and 1100% of that of the second dielectric, and the first and second dielectric having different microstructures to limit crystal growth therebetween during tempering;
d) a second infrared reflective layer; and
e) an outer dielectric layer.
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23. A haze-resistant temperable coating carried by a substrate having a surface, comprising, from the substrate surface outwardly:
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a) an inner dielectric layer;
b) a first infrared reflective layer;
c) an intermediate dielectric stack comprising alternating layers of a first dielectric and a second dielectric, each of said alternating layers having a physical thickness of no more than about 225 Å
, the first dielectric having an index of refraction between about 90% and 110% of that of the second dielectric, and the first and second dielectric having different microstructures to limit crystal growth therebetween during tempering;
d) a second infrared reflective layer; and
e) an outer dielectric layer.
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34. A haze-resistant temperable coating carried by a substrate having a surface, comprising, from the substrate surface outwardly:
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a) an inner dielectric layer;
b) a first infrared reflective layer;
c) an intermediate dielectric stack comprising alternating layers of a dielectric oxide and a dielectric nitride, each of said alternating layers having an optical thickness of no more than about 475 A, the dielectric oxide having an index of refraction between about 90% and 110% of that of the dielectric nitride, the dielectric oxide and the dielectric nitride having different microstructures to limit crystal growth therebetween during tempering;
d) a second infrared reflective layer; and
e) an outer dielectric layer.
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40. A method of forming a coated glass article, the method comprising:
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a) providing a glass substrate;
b) depositing a heat treatable coating on the glass substrate by;
i) depositing an inner dielectric layer;
ii) thereafter, depositing a first infrared reflective layer;
iii) thereafter, depositing an intermediate dielectric stack by depositing alternating layers of a first dielectric and a second dielectric, each of said alternating layers having an optical thickness of no more than about 450 Å
, the first dielectric having an index of refraction between about 90% and 110% of that of the second dielectric, and the first and second dielectric having different microstructures;
iv) thereafter, depositing a second infrared reflective layer; and
v) thereafter, depositing an outer dielectric layer. c) heating the resultant coated glass substrate to a temperature of at least about 400°
C., which temperature promotes crystal growth in at least one of the first and second dielectrics, the different microstructures of the first and second dielectrics limiting crystal growth therebetween during said heating. - View Dependent Claims (41, 42, 43, 44, 45)
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Specification