Glass coated with heat reflecting colored film and process for its production

Abstract

A glass coated with a heat reflecting colored film, which is excellent in the uniformity of the film thickness and composition, which is free from a unfavorable whitish coloration in ceramic color printing and which is excellent in a silver print coloration, is presented. A glass coated with a heat reflecting colored film, obtained by heat treatment of a glass having a first layer containing iron oxide, chromium oxide and nickel oxide and a second layer containing cobalt oxide, laminated sequentially by a sputtering method, on one side of a glass substrate.

What is claimed is:  
     
         1 . A glass coated with a heat reflecting colored film, which comprises a glass substrate, and a first layer containing iron oxide and a second layer containing cobalt oxide, laminated sequentially by a sputtering method on one side of the glass substrate, wherein: 
 in the first layer, the amount of iron based on the total metal amount is at least 60 mass %, and    in the second layer, the amount of cobalt based on the total metal amount is at least 60 mass %.    
     
     
         2 . A glass coated with a heat reflecting colored film, which comprises a glass substrate, and a first layer containing cobalt oxide and a second layer containing iron oxide, laminated sequentially by a sputtering method on one side of the glass substrate, wherein: 
 in the first layer, the amount of cobalt based on the total metal amount is at least 60 mass %, and    in the second layer, the amount of iron based on the total metal amount is at least 60 mass %.    
     
     
         3 . A glass coated with a heat reflecting colored film, which comprises a glass substrate, and a first layer containing iron oxide, chromium oxide and nickel oxide and a second layer containing cobalt oxide, laminated sequentially by a sputtering method on one side of the glass substrate, wherein: 
 in the first layer, the amounts of iron, chromium and nickel, based on the total metal amount, are as follows: 
 iron: from 60 mass % to 85 mass %,  
 chromium: from 10 mass % to 28 mass %, and  
 nickel: from 5 mass % to 24 mass %, and  
 in the second layer, the amount of cobalt based on the total metal amount is at least 60 mass %.  
   
     
     
         4 . A glass coated with a heat reflecting colored film, which comprises a glass substrate, and a first layer containing cobalt oxide and a second layer containing iron oxide, chromium oxide and nickel oxide, laminated sequentially by a sputtering method on one side of the glass substrate, wherein: 
 in the first layer, the amount of cobalt based on the total metal amount, is at least 60 mass %, and    in the second layer, the amounts of iron, chromium and nickel, based on the total metal amount, are as follows: 
 iron: from 60 mass % to 85 mass %,  
 chromium: from 10 mass % to 28 mass %, and  
 nickel: from 5 mass % to 24 mass %.  
   
     
     
         5 . A process for producing the glass coated with a heat reflecting colored film as defined in  claim 1 , which comprises: 
 a step of laminating the first layer on one side of the glass substrate, by sputtering by means of a metal oxide target containing iron oxide, and    a step of laminating the second layer on the first layer, by sputtering by means of a metal target containing cobalt in a sputtering gas atmosphere containing an oxidizing gas, or by sputtering by means of a metal oxide target containing cobalt oxide in a sputtering gas atmosphere containing no oxidizing gas or in a sputtering gas atmosphere containing an oxidizing gas.    
     
     
         6 . A process for producing the glass coated with a heat reflecting colored film as defined in  claim 2 , which comprises: 
 a step of laminating the first layer on one side of the glass substrate, by sputtering by means of a metal target containing cobalt in a sputtering gas atmosphere containing an oxidizing gas, or by sputtering by means of a metal oxide target containing cobalt oxide in a sputtering gas atmosphere containing no oxidizing gas or in a sputtering gas atmosphere containing an oxidizing gas, and    a step of laminating the second layer on the first layer, by sputtering by means of a metal oxide target containing iron oxide.    
     
     
         7 . A process for producing the glass coated with a heat reflecting colored film as defined in  claim 3 , which comprises: 
 a step of laminating the first layer on one side of the glass substrate, by sputtering by means of a metal target containing iron, chromium and nickel as components in a sputtering gas atmosphere containing an oxidizing gas, and    a step of laminating the second layer on the first layer, by sputtering by means of a metal target containing cobalt in a sputtering gas atmosphere containing an oxidizing gas, or by sputtering by means of a metal oxide target containing cobalt oxide in a sputtering gas atmosphere containing no oxidizing gas or in a sputtering gas atmosphere containing an oxidizing gas.    
     
     
         8 . A process for producing the glass coated with a heat reflecting colored film as defined in  claim 4 , which comprises: 
 a step of laminating the first layer on one side of the glass substrate, by sputtering by means of a metal target containing cobalt in a sputtering gas atmosphere containing an oxidizing gas, or by sputtering by means of a metal oxide target containing cobalt oxide in a sputtering gas atmosphere containing no oxidizing gas or in a sputtering gas atmosphere containing an oxidizing gas, and    a step of laminating the second layer on the first layer, by sputtering by means of a metal target containing iron, chromium and nickel as components in a sputtering gas atmosphere containing an oxidizing gas.    
     
     
         9 . A glass coated with a heat reflecting colored film, obtained by heat treatment of the glass coated with a heat reflecting colored film as defined in  claim 1 .  
     
     
         10 . A glass coated with a heat reflecting colored film, obtained by heat treatment of the glass coated with a heat reflecting colored film as defined in  claim 2 .  
     
     
         11 . A glass coated with a heat reflecting colored film, obtained by heat treatment of the glass coated with a heat reflecting colored film as defined in  claim 3 .  
     
     
         12 . A glass coated with a heat reflecting colored film, obtained by heat treatment of the glass coated with a heat reflecting colored film as defined in  claim 4 .  
     
     
         13 . The glass coated with a heat reflecting colored film according to  claim 9 , wherein the surface sheet resistance of the film-coated side is at least 10 5  Ω/□.  
     
     
         14 . The glass coated with a heat reflecting colored film according to  claim 10 , wherein the surface sheet resistance of the film-coated side is at least 10 5  Ω/□.  
     
     
         15 . The glass coated with a heat reflecting colored film according to  claim 11 , wherein the surface sheet resistance of the film-coated side is at least 10 5  Ω/□.  
     
     
         16 . The glass coated with a heat reflecting colored film according to  claim 12 , wherein the surface sheet resistance of the film-coated side is at least 10 5  Ω/□.  
     
     
         17 . The glass coated with a heat reflecting colored film according to  claim 9 , wherein the visible light transmittance is from 20 to 40%, and the visible light reflectance of the film-coated side and the other side is from 20 to 40% and from 10 to 25%, respectively.  
     
     
         18 . The glass coated with a heat reflecting colored film according to  claim 10 , wherein the visible light transmittance is from 20 to 40%, and the visible light reflectance of the film-coated side and the other side is from 20 to 40% and from 10 to 25%, respectively.  
     
     
         19 . The glass coated with a heat reflecting colored film according to  claim 11 , wherein the visible light transmittance is from 20 to 40%, and the visible light reflectance of the film-coated side and the other side is from 20 to 40% and from 10 to 25%, respectively.  
     
     
         20 . The glass coated with a heat reflecting colored film according to  claim 12 , wherein the visible light transmittance is from 20 to 40%, and the visible light reflectance of the film-coated side and the other side is from 20 to 40% and from 10 to 25%, respectively.  
     
     
         21 . A process for producing the glass coated with a heat reflecting colored film, which comprises: 
 a step of coating a ceramic color paste and/or a silver paste on the glass coated with a heat reflecting colored film obtained by the process as defined in  claim 5 , and    a step of then carrying out heat treatment.    
     
     
         22 . A process for producing the glass coated with a heat reflecting colored film, which comprises: 
 a step of coating a ceramic color paste and/or a silver paste on the glass coated with a heat reflecting colored film obtained by the process as defined in claim  6 , and    a step of then carrying out heat treatment.    
     
     
         23 . A process for producing the glass coated with a heat reflecting colored film, which comprises: 
 a step of coating a ceramic color paste and/or a silver paste on the glass coated with a heat reflecting colored film obtained by the process as defined in  claim 7 , and    a step of then carrying out heat treatment.    
     
     
         24 . A process for producing the glass coated with a heat reflecting colored film, which comprises: 
 a step of coating a ceramic color paste and/or a silver paste on the glass coated with a heat reflecting colored film obtained by the process as defined in  claim 8 , and    a step of then carrying out heat treatment.