US 12,332,407 B2
Heatable windshield
Zhixun Ma, Richmond, CA (US); Adam D. Polcyn, Pittsburgh, PA (US); and Andrew Wagner, Pittsburgh, PA (US)
Assigned to Vitro Flat Glass LLC, Cheswick, PA (US)
Filed by Vitro Flat Glass LLC, Cheswick, PA (US)
Filed on Mar. 15, 2023, as Appl. No. 18/121,660.
Application 18/121,660 is a continuation of application No. 16/830,829, filed on Mar. 26, 2020.
Claims priority of provisional application 62/976,645, filed on Feb. 14, 2020.
Claims priority of provisional application 62/825,326, filed on Mar. 28, 2019.
Prior Publication US 2023/0221466 A1, Jul. 13, 2023
Int. Cl. B32B 15/04 (2006.01); B32B 7/025 (2019.01); B32B 17/06 (2006.01); B32B 17/10 (2006.01); B60J 3/00 (2006.01); B60K 35/00 (2006.01); C03C 17/36 (2006.01); C23C 14/00 (2006.01); G02B 1/116 (2015.01); G02B 5/28 (2006.01); G02B 27/01 (2006.01); H05B 3/84 (2006.01); H05B 3/86 (2006.01); B60K 35/23 (2024.01); B60K 35/40 (2024.01)
CPC G02B 1/116 (2013.01) [B32B 7/025 (2019.01); B32B 17/10036 (2013.01); B32B 17/10201 (2013.01); B32B 17/10229 (2013.01); B60J 3/007 (2013.01); B60K 35/00 (2013.01); C03C 17/3639 (2013.01); C03C 17/3649 (2013.01); C03C 17/366 (2013.01); C23C 14/0036 (2013.01); G02B 5/285 (2013.01); G02B 27/0101 (2013.01); H05B 3/84 (2013.01); H05B 3/86 (2013.01); B32B 2250/05 (2013.01); B60K 35/23 (2024.01); B60K 35/425 (2024.01); C03C 2218/155 (2013.01); G02B 2027/012 (2013.01); H05B 2203/013 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A coated article comprising:
a substrate;
a first dielectric layer over at least a portion of the substrate, wherein the first dielectric layer comprises a total thickness of 42 nm to 47 nm, wherein the first dielectric layer consists of a first film over at least a portion of the substrate and a second film over at least a portion of the first film, and wherein the first film comprises zinc stannate or tin oxide;
a first metallic layer over at least a portion of the first dielectric layer, wherein the first metallic layer has a thickness of at least 90 Å and at most 100 Å;
a first primer layer comprising titanium over at least a portion of the first metallic layer, wherein the first primer layer has a thickness of from 20 Å to 40 Å;
a second dielectric layer over at least a portion of the first primer layer, wherein the second dielectric layer comprises a total thickness of 78 nm to 85 nm, wherein the second dielectric layer consists of a first film over at least a portion of the first primer layer, a second film over at least a portion of the first film, and a third film over at least a portion of the second film, and wherein the second film comprises zinc stannate;
a second metallic layer over at least a portion of the second dielectric layer, wherein the second metallic layer has a thickness of at least 110 Å and at most 130 Å;
a second primer layer comprising titanium over at least a portion of the second metallic layer, wherein the second primer layer has a thickness of from 20 Å to 40 Å;
a third dielectric layer over at least a portion of the second primer layer, wherein the third dielectric layer comprises a total thickness of 70 nm to 82.5 nm, wherein the third dielectric layer consists of a first film over at least a portion of the second primer layer, a second film over at least a portion of the first film, and a third film over at least a portion of the second film, and wherein the second film comprises zinc stannate;
a third metallic layer over at least a portion of the third dielectric layer, wherein the third metallic layer has a thickness of at least 110 Å and at most 130 Å;
a third primer layer comprising titanium over at least a portion of the third metallic layer, wherein the third primer layer has a thickness of from 20 Å to 40 Å;
a fourth dielectric layer over at least a portion of the third primer layer, wherein the fourth dielectric layer comprises a total thickness of 55 nm to 70 nm, wherein the fourth dielectric layer consists of a first film over at least a portion of the third primer layer, a second film over at least a portion of the first film, and a third film over at least a portion of the second film, and wherein the second film comprises zinc stannate;
a fourth metallic layer over at least a portion of the fourth dielectric layer, wherein the fourth metallic layer has a thickness of at least 90 Å and at most 110 Å;
a fourth primer layer comprising titanium over at least a portion of the fourth metallic layer, wherein the fourth primer layer has a thickness of from 20 Å to 40 Å; and
a fifth dielectric layer over at least a portion of the fourth primer layer, wherein the fifth dielectric layer comprises a total thickness of 42.5 nm to 47.5 nm, wherein the fifth dielectric layer consists of a first film over at least a portion of the fourth primer layer and a second film over at least a portion of the first film, and wherein the second film comprises zinc stannate or tin oxide;
wherein the coated article consists of four metallic layers,
wherein a total combined thickness of the four metallic layers is at least 40 nanometers, and no more than 47 nanometers,
wherein the coated article has a sheet resistance of not more than 0.85Ω/□, and
wherein the coated article has a visible light transmittance of greater than 70%.