Anti-reflective coated glass article

Patent metadata

Field	Value
Publication number	US-2016124120-A1
Application number	US-201514884832-A
Country	US
Kind code	A1
Filing date	Oct 16, 2015
Priority date	Oct 31, 2014
Publication date	May 5, 2016
Grant date	—

Abstract

A coated glass article includes a glass substrate and a coating formed over the glass substrate. The coating includes a first inorganic metal oxide layer deposited over a major surface of the glass substrate. The first inorganic metal oxide layer has a refractive index of 1.8 or more. The coating also includes a second inorganic metal oxide layer deposited over the first inorganic metal oxide layer. The second inorganic metal oxide layer has a refractive index of 1.6 or less. The coated glass article exhibits a total visible light reflectance of 6.5% or less.

First claim

1 . A coated glass article comprising:
a glass substrate; and a coating deposited over the glass substrate, wherein the coating comprises: i. a first inorganic metal oxide layer deposited over a major surface of the glass substrate, wherein the first inorganic metal oxide layer has a refractive index of 1.8 or more, ii. a second inorganic metal oxide layer deposited over the first inorganic metal oxide layer, wherein the second inorganic metal oxide layer has a refractive index of 1.6 or less, wherein the coated glass article exhibits a total visible light reflectance of 6.5% or less.

2 . The coated glass article of claim 1 , wherein the first inorganic metal oxide layer and the second inorganic metal oxide layer are selected so that the coated glass article exhibits a sheet resistance of greater than 1.0×10 5 ohm/sq.

3 . The coated glass article of claim 1 , wherein the coated glass article exhibits a total visible light transmittance of 94% (Illuminant C) or more.

4 . The coated glass article of claim 1 , wherein the first inorganic metal oxide layer comprises tin oxide or titanium dioxide.

5 . The coated glass article of claim 1 , wherein the second inorganic metal oxide layer comprises silicon dioxide.

6 . The coated glass article of claim 1 , wherein the coating consists of the first inorganic metal oxide layer and the second inorganic metal oxide layer, the first inorganic metal oxide layer being deposited directly on the major surface of the glass substrate and the second inorganic metal oxide layer being deposited directly on the first inorganic metal oxide layer and forming an outermost surface of the coated glass article.

7 . The coated glass article of claim 1 , wherein the coating further comprises a third inorganic metal oxide, the third inorganic metal oxide layer being deposited directly on the major surface of the glass substrate and having a refractive index of 1.6 or less, and the first inorganic metal oxide layer being deposited directly on the third inorganic metal oxide layer.

8 . The coated glass article of claim 1 , wherein the total visible light reflectance exhibited by the coated glass article is 6.0% or less.

9 . The coated glass article of claim 2 , wherein the coated glass article exhibits a sheet resistance of 1.0×10 7 ohm/sq. or more.

10 . The coated glass article of claim 4 , wherein the first inorganic metal oxide layer is deposited at a thickness of 50 nm or less.

11 . The coated glass article of claim 5 , wherein the second inorganic metal oxide layer is deposited at a thickness of 100 nm or more.

12 . The coated glass article of claim 7 , wherein the third inorganic metal oxide layer is silicon dioxide.

13 . The coated glass article of claim 10 , wherein the first inorganic metal oxide layer is deposited at a thickness of 35 nm or less.

14 . The coated glass article of claim 11 , wherein the second inorganic metal oxide layer is deposited at a thickness of 100-125 nm.

15 . The coated glass article of claim 12 , wherein the third inorganic metal oxide layer is deposited at a thickness of 25 nm or less.

16 . A coated glass article comprising:
a glass substrate; and a coating deposited over the glass substrate, wherein the coating comprises: i. a first inorganic metal oxide layer deposited over a major surface of the glass substrate, wherein the first inorganic metal oxide layer has a refractive index of 1.8 or more and is deposited at a thickness of 50 nm or less, ii. a second inorganic metal oxide layer directly on the first layer has a refractive index of 1.6 or less and is deposited at a thickness of 100 nm or more, iii. a third inorganic metal oxide layer deposited directly on the major surface of the glass substrate, wherein the third inorganic metal oxide layer has a refractive index of 1.6 or less and is deposited at a thickness of 25 nm or less, wherein the coated glass article exhibits a total visible light reflectance of 6.0% or less, a total visible light transmittance of 94% (Illuminant C) or more, and a sheet resistance of 1.0×10 7 ohm/sq. or more.

17 . The coated glass article of claim 16 , wherein the first inorganic metal oxide layer comprises undoped tin oxide and each of the second inorganic metal oxide layer and the third inorganic metal oxide layer comprises silicon dioxide.

18 . The coated glass article of claim 16 , wherein the first inorganic metal oxide layer is deposited directly on the third inorganic metal oxide layer.

19 . A laminated glass unit comprising a coated glass article according to claim 1 .

20 . A touch screen electronic device comprising a coated glass article according to claim 1 .

Assignees

• Pilkington Group Ltd

Inventors

• Varanasi Srikanth

Classifications

• G02B1/116 Primary

  including electrically conducting layers · CPC title

• C03C17/3417 Primary

  all coatings being oxide coatings · CPC title

• C03C2217/734

  comprising an alternation of high and low refractive indexes · CPC title

• G02B1/115

  Multilayers · CPC title

• G06F3/041

  Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means · CPC title