Coated glass
First Claim
1. A coated glass substrate with a coating comprising a layer of additional metal selected from aluminum, titanium, zinc, tantalum and zirconium, a silver layer from 5 nm to 30 nm thick over the layer of additional metal, a further layer of additional metal selected from aluminum, titanium, zinc, tantalum and zirconium over the silver layer, and an anti-reflection metal oxide layer over said further layer of additional metal which coated glass substrate, when subjected to a bending and/or toughening cycle in which the glass is heated in air to a temperature above the softening temperature of the glass, develops an increased light transmission, with the thickness of any anti-reflection metal oxide layer overlying the silver layer plus the thickness of the oxidised additional metal over the silver being in the range of from 10 nm to 80 nm.
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Accused Products
Abstract
Bent and/or toughened silver coated glass having light transmission is produced by depositing layers of additional metal over, or both under and over, the silver layer. When the additional metal is used over the silver layer, it is selected from aluminium, titanium, zinc and tantalum. When the additional metal is used both under and over the silver, it is selected from aluminium, titanium, zinc, tantalum and zirconium. The additional metal is used in an amount such that the light transmission of the coated glass increases on bending and/or toughening. The bent and/or toughened coated glass is useful for architectural glazing and as vehicle windows.
49 Citations
16 Claims
- 1. A coated glass substrate with a coating comprising a layer of additional metal selected from aluminum, titanium, zinc, tantalum and zirconium, a silver layer from 5 nm to 30 nm thick over the layer of additional metal, a further layer of additional metal selected from aluminum, titanium, zinc, tantalum and zirconium over the silver layer, and an anti-reflection metal oxide layer over said further layer of additional metal which coated glass substrate, when subjected to a bending and/or toughening cycle in which the glass is heated in air to a temperature above the softening temperature of the glass, develops an increased light transmission, with the thickness of any anti-reflection metal oxide layer overlying the silver layer plus the thickness of the oxidised additional metal over the silver being in the range of from 10 nm to 80 nm.
- 10. A bent and/or toughened silver-coated glass substrate having a light transmission of at least 80% of that of the uncoated glass the coating being deposited directly on the glass substrate and comprising an anti-reflection metal oxide layer, an oxidised layer of metal selected from aluminum, titanium, tantalum and zirconium over the anti-reflection layer, a silver layer from 5 nm to 30 nm thick over said oxidised metal layer, a further oxidised layer of metal selected from aluminum, titanium, tantalum and zirconium over said silver layer, and an overlying anti-reflection metal oxide layer, the said two layers of oxidised metal having a combined total thickness in the range of from 8 nm to 30 nm, and the thickness of any anti-reflection metal oxide layer overlying the silver layer plus the thickness of the oxidised additional metal over the silver being in the range of from 10 nm to 80 nm.
- 12. A bent and/or toughened silver-coated glass substrate having a light transmission of at least 80% of the uncoated glass, the coating being deposited directly on the glass substrate and comprising an anti-reflection metal oxide layer, a silver layer from 5 nm to 30 nm thick over said anti-reflection layer, and an oxidised layer of titanium or tantalum over said silver layer, and an overlying anti-reflection metal oxide layer, the said layer of oxidised metal having a thickness in the range of from 8 nm to 30 nm, and the thickness of any anti-reflection metal oxide layer overlying the silver layer plus the thickness of the oxidised additional metal over the silver being in the range of from 10 nm to 80 nm.
- 14. A bent and/or toughened silver-coated glass substrate having a light transmission of at least 80% of the uncoated glass, the coating being deposited directly on the glass substrate and comprising an anti-reflection metal oxide layer, a silver layer from 5 nm to 30 nm thick over said anti-reflection metal oxide layer and an overlying anti-reflection metal oxide layer, with oxidised zinc distributed through all the layers of the coating, with the thickness of any anti-reflection metal oxide layer overlying the silver layer being in the range of from 10 nm to 80 nm.
Specification