Glass plate with antireflection film

Patent metadata

Field	Value
Publication number	US-2018265403-A1
Application number	US-201815986990-A
Country	US
Kind code	A1
Filing date	May 23, 2018
Priority date	Dec 3, 2015
Publication date	Sep 20, 2018
Grant date	—

Abstract

Provided is a glass sheet with an antireflection film: containing a glass sheet, a first transparent high refractive index layer located on the glass sheet, a first transparent low refractive index layer located on the first transparent high refractive index layer, a second transparent high refractive index layer located on the first transparent low refractive index layer, and a second transparent low refractive index layer located on the second transparent high refractive index layer; having a haze after heating at 600° C. to 700° C. for 15 minutes being 0.4% or less; and having a visible light reflectance measured from the side of the second transparent low refractive index layer based on JIS R 3106 being 1.0% or less.

First claim

1 . A glass sheet with an antireflection film,
comprising:
a glass sheet,
a first transparent high refractive index layer located on the glass sheet,
a first transparent low refractive index layer located on the first transparent high refractive index layer,
a second transparent high refractive index layer located on the first transparent low refractive index layer, and
a second transparent low refractive index layer located on the second transparent high refractive index layer,
having a haze after heating at 600° C. to 700° C. for 15 minutes being 0.4% or less, and having a visible light reflectance measured from a side of the second transparent low refractive index layer based on JIS R 3106 being 1.0% or less.

2 . The glass sheet with an antireflection film, according to claim 1 ,
wherein the first transparent high refractive index layer is composed of a titanium oxide doped with a zirconium oxide in a concentration of 27 to 50 mol %, and the first and second transparent low refractive index layers are mainly composed of a silicon oxide.

3 . The glass sheet with an antireflection film, according to claim 2 ,
wherein the first transparent high refractive index layer is composed of the titanium oxide doped with the zirconium oxide in a concentration of 30 to 40 mol %.

4 . The glass sheet with an antireflection film, according to claim 1 ,
wherein the first transparent high refractive index layer is composed of a titanium oxide doped with a silicon oxide in a concentration of 12 to 30 mol %, and the first and second transparent low refractive index layers are mainly composed of a silicon oxide.

5 . The glass sheet with an antireflection film, according to claim 2 ,
wherein the second transparent high refractive index layer is formed of a film of the same material as that of the first transparent high refractive index layer.

6 . The glass sheet with an antireflection film, according to claim 4 ,
wherein the second transparent high refractive index layer is formed of a film of the same material as that of the first transparent high refractive index layer.

7 . The glass sheet with an antireflection film, according to claim 2 ,
wherein the second transparent high refractive index layer comprises the same element doped as in the first transparent high refractive index layer, and an amount of the element is larger than that in the first transparent high refractive index layer.

8 . The glass sheet with an antireflection film, according to claim 4 ,
wherein the second transparent high refractive index layer comprises the same element doped as in the first transparent high refractive index layer, and an amount of the element is larger than that in the first transparent high refractive index layer.

9 . The glass sheet with an antireflection film, according to claim 1 , having a color change ΔE between before and after heating at 600° C. to 700° C. for 15 minutes being 5 or less.

10 . The glass sheet with an antireflection film, according to claim 9 , having the color change ΔE between before and after heating at 600° C. to 700° C. for 15 minutes being 2 or less.

11 . The glass sheet with an antireflection film, according to claim 1 ,
wherein the second transparent low refractive index layer is composed of a silicon oxide doped with a zirconium oxide in an amount of 5 to 50 mol %.

12 . The glass sheet with an antireflection film, according to claim 11 ,
wherein the second transparent low refractive index layer is composed of a silicon oxide doped with a zirconium oxide and has an average hydrogen concentration C av measured by the following method being less than 10 atom %: the method of measuring the average hydrogen concentration C av of the second transparent low refractive index layer comprises measuring a hydrogen concentration at a depth range of 15 nm to 20 nm by a high resolution ERDA method in a state where 5 nm of a carbon film is formed on the second transparent low refractive index layer, and averaging the obtained values to obtain the average hydrogen concentration C a y.

13 . The glass sheet with an antireflection film, according to claim 11 ,
wherein the first transparent low refractive index layer is free of a zirconium oxide doped.

14 . The glass sheet with an antireflection film, according to claim 11 ,
wherein the first transparent low refractive index layer is composed of a silicon oxide doped with a zirconium oxide in an amount of 5 to 50 mol %.

15 . The glass sheet with an antireflection film, according to claim 1 ,
comprising the first transparent high refractive index layer, the first transparent low refractive index layer, the second transparent high refractive index layer, and the second transparent low refractive index layer provided on both surfaces of the glass sheet, having a haze after heating at 600° C. to 700° C. for 15 minutes being 0.4% or less, and having a visible light reflectance measured from a side of the second transparent low refractive index layer based on JIS R 3106 being 2.0% or less.

Assignees

• Asahi Glass Co Ltd

Inventors

• Kawahara Hirotomo
• Suzuki Kenichi
• Aomine Nobutaka

Classifications

• B32B17/10201

  Dielectric coatings · CPC title

• B32B17/10036

  comprising two outer glass sheets · CPC title

• C03C2218/365

  Coating different sides of a glass substrate · CPC title

• B32B17/1055

  characterized by the resin layer, i.e. interlayer · CPC title

• B32B7/023

  Optical properties · CPC title