Low-E matchable coated articles and methods of making same
First Claim
1. An insulating glass (IG) window unit comprising:
- first and second glass substrates sealed together proximate their respective peripheral edges so as to form an insulating space therebetween;
a layer system supported by one of said glass substrates proximate said insulating space, said layer system comprising an infrared (IR) reflecting silver layer located between first and second dielectric layers; and
wherein said IG unit has a Δ
E* value (exterior or outside) no greater than 2.5 after or due to heat treatment.
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Accused Products
Abstract
A heat treatable coated article including an infrared (IR) reflecting layer (e.g., of or including Ag), the coated article being able to attain a ΔE* (glass side) no greater than about 3.0, more preferably no greater than 2.5, and even more preferably no greater than 2.0, following or due to heat treatment (e.g., thermal tempering). Accordingly, low-E (i.e., low emissivity) coated articles of certain embodiments of this invention appear from the glass side thereof visually similar to the naked eye both before and after heat treatment. Coated articles herein may be used in the context of insulating glass (IG) window units, vehicle windshields, or any other suitable applications. In certain embodiments of this invention, an exemplary layer stack includes: glass/Si3N4/NiCr/Ag/NiCr/Si3N4. Other materials may instead be used without departing from the scope and/or spirit of the instant invention which is a low-E matchable product.
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Citations
33 Claims
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1. An insulating glass (IG) window unit comprising:
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first and second glass substrates sealed together proximate their respective peripheral edges so as to form an insulating space therebetween;
a layer system supported by one of said glass substrates proximate said insulating space, said layer system comprising an infrared (IR) reflecting silver layer located between first and second dielectric layers; and
wherein said IG unit has a Δ
E* value (exterior or outside) no greater than 2.5 after or due to heat treatment.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
first silicon nitride inclusive layer;
300-380 Å
thickfirst Ni or NiCr inclusive layer;
20-150 Å
thicksilver layer;
40-120 Å
thicksecond Ni or NiCr inclusive layer;
20-150 Å
thicksecond silicon nitride inclusive layer;
400-500 Å
thick.
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9. The coated article of claim 8, wherein said layer system comprises the recited layers at the following thicknesses:
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first silicon nitride inclusive layer;
320-360 Å
thickfirst Ni or NiCr inclusive layer;
20-90 Å
thicksilver layer;
60-80 Å
thicksecond Ni or NiCr inclusive layer;
20-90 Å
thicksecond silicon nitride inclusive layer;
420-480 Å
thick.
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10. The IG unit of claim 1, wherein said IG unit has a Δ
- a* value (exterior or outside) no greater than 1.0.
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11. The IG unit of claim 1, wherein said IG unit has a Δ
- a* value (exterior or outside) no greater than 0.8 after or due to heat treatment.
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12. The IG unit of claim 1, wherein said one substrate with said layer system thereon has a hemispherical emissivity (Eh) of no greater than 0.25.
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13. The IG unit of claim 12, wherein said one substrate with said layer system thereon has a hemispherical emissivity (Eh) of no greater than 0.20.
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14. The IG unit of claim 1, wherein said one substrate with said layer system thereon has a sheet resistance value RS, no greater than 20 ohms/square.
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15. The IG unit of claim 14, wherein said one substrate with said layer system thereon has a sheet resistance value RS no greater than 15 ohms/square.
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16. The IG unit of claim 15, wherein said one substrate with said layer system thereon has a sheet resistance value Rs no greater than 12 ohms/square.
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17. The IG window unit of claim 1, wherein the IG window unit has a visible transmittance of from 10-55%.
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18. The IG window unit of claim 1, wherein the IG window unit has a Δ
- E* value (exterior or outside) no greater than 1.0.
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19. An insulating glass (IG) unit comprising:
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first and second substrates sealed together;
a layer system provided on said first substrate, said layer system comprising from the first substrate outwardly, a first silicon nitride inclusive layer, a first Ni or NiCr inclusive layer, an IR reflecting metal layer, a second Ni or NiCr inclusive layer, and a second silicon nitride inclusive layer, wherein each of said first and second Ni or NiCr inclusive layers is at least about 20 Å
thick; and
wherein said first substrate with said layer system thereon has a hemispherical emissivity (Eh) of no greater than 0.25 before heat treatment, a sheet resistance RS no greater than 20 ohms/square before heat treatment, and a Δ
E* value (glass side or outside) no greater than 2.5 after or due to heat treatment.- View Dependent Claims (20, 21, 22)
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23. A thermally insulating panel assembly comprising:
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first and second substrates seal together proximate their respective peripheries to form an insulating space therebetween;
a layer system provided on said first substrate, said layer system comprising from the first substrate outwardly, a first silicon nitride inclusive layer 300 to 380 Å
thick, a first Ni or NiCr inclusive layer from 20 to 90 Å
thick, a silver layer from 40-120 Å
thick, a second Ni or NiCr inclusive layer from 20 to 90 Å
thick, and a second silicon nitride inclusive layer;
wherein said first substrate with said layer system thereon has a hemispherical emissivity (Eh) of no greater than 0.25 and a sheet resistance Rs no greater than 20 ohms/square; and
wherein the IG unit has a visible transmission of no greater than 10-55%, and a Δ
E* value (glass side or outside) no greater than 2.5 after or due to heat treatment.- View Dependent Claims (24)
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25. A coated article comprising:
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a layer system supported by a glass substrate, said layer system comprising an infrared (IR) reflecting silver layer located between first and second dielectric layers; and
wherein said coated article is characterized by a glass side or outside Rsolar which is greater than a glass side or outside visible reflectance R(G or out), and a visible transmittance (TY or Tvis) of from about 10-65%, and has a Δ
E* value (glass side or outside) no greater than 2.5 after or due to heat treatment.- View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33)
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Specification