Low reflection glass and protective plate for display
View Patent ↗Provided is a low reflection glass excellent in the abrasion resistance, the weather resistance, the productivity and the outer appearance, and a protective plate for a display. A low reflection glass includes a glass substrate and an antireflection film formed on the surface of the glass substrate. The antireflection film comprises an interlayer and an outermost layer in this order from the glass substrate side; and the outermost layer is a layer containing Si atoms, C atoms and O atoms. The content of C atoms is from 0.5 to 3 mol % based on 100 mol % of the total amount of Si atoms, C atoms and 0 atoms. The interlayer is a layer (a) (high refractive index layer) or a layer (b) (light absorbing layer). A protective plate for a display comprises a support substrate comprising the low reflection glass and a conductive film provided on a side on which no antireflection film is formed of the support substrate.
1. A low reflection glass comprising a glass substrate and an antireflection film formed on the surface of the glass substrate,
wherein the antireflection film comprises an interlayer and an outermost layer disposed in this order from the glass substrate side; and
the outermost layer is a layer containing Si atoms, C atoms and O atoms, the content of C atoms being from 0.5 to 3 mol % based on 100 mol % of the total amount of Si atoms, C atoms and O atoms, and the interlayer is the following
layer (a) having an extinction coefficient K 1 at a wavelength of from 380 to 780 nm of 0≦K 1 <0.1 and a refractive index n 1 at a wavelength of 550 nm of 2.0≦n i ≦2.5.
2. The low reflection glass according to claim 1 , wherein the outermost layer is a layer containing SiO 2 as the main component.
3. The low reflection glass according to claim 1 , wherein the outermost layer has a refractive index of at least 1.45 and less than 1.5 at a wavelength of 550 nm.
4. The low reflection glass according to claim 1 , wherein the layer (a) contains Ti atoms and O atoms as the main components, and the proportion of Ti atoms and O atoms is TiO y , wherein y is from 1.9 to 2.0.
5. The low reflection glass according to claim 2 , wherein the layer (a) contains Ti atoms and O atoms as the main components, and the proportion of Ti atoms and O atoms is TiO y , wherein y is from 1.9 to 2.0.
6. The low reflection glass according to claim 3 , wherein the layer (a) contains Ti atoms and O atoms as the main components, and the proportion of Ti atoms and O atoms is TiO y , wherein y is from 1.9 to 2.0.
7. A protective plate for a display, comprising the low reflection glass as defined in claim 1 .
8. A protective plate for a plasma display, comprising a support substrate comprising the low reflection glass as defined in claim 1 , and a conductive film provided on a side on which no antireflection film is formed of the support substrate.