Photosensitive conductive paste for electrode formation and electrode

Abstract

A photosensitive conductive paste for electrode formation containing conductive metal particles, a glass binder, a monomer, a photoinitiator, an organic polymer binder, an organic medium and an ultraviolet absorber which does not substantially change reflectance of a paste in a visible light range.

1 . A method for forming an electrode, comprising the steps of:
 coating a photosensitive conductive paste for electrode formation on a substrate, said photosensitive conductive paste for electrode formation comprising: conductive metal particles, a glass binder, a monomer, a photoinitiator, an organic polymer binder, an organic medium and an ultraviolet absorber comprising a benzotriazole derivative or a hydroxyphenyltriazine derivative which does not substantially change reflectance of a the paste in a visible light range, wherein when the ultraviolet absorber is a benzotriazole derivative the amount of benzotriazole derivative is 0.1 to 0.5 wt % and when the ultraviolet absorber is a hydroxyphenyltriazine derivative the amount of hydroxyphenyltriazine derivative is 0.2 to 1.0 wt %, based on the overall paste weight;   drying the coated conductive paste;   exposing a film formed by drying the conductive paste using a photomask;   obtaining an electrode pattern by developing the exposed film; and   firing the resulting electrode pattern.   
   
   
       2 . The method for forming an electrode according to  claim 1 , wherein the step for exposing the film uses proximity exposure. 
   
   
       3 . The method for forming an electrode according to  claim 1 , wherein difference between the reflectance of a paste which does not contain the ultraviolet absorber, and the reflectance of the paste which contains the ultraviolet absorber is less than 5% in the visible light range. 
   
   
       4 . The method for forming an electrode according to  claim 1 , wherein the difference between the reflectance of a paste which does not contain the ultraviolet absorber, and the reflectance of the paste which contains the ultraviolet absorber is less than 3% in the visible light range. 
   
   
       5 . The method for forming an electrode according to  claim 1  wherein the conductive metal is selected from the group consisting of gold, silver, palladium, platinum, copper and combinations thereof. 
   
   
       6 . The method for forming an electrode according to  claim 5 , wherein the conductive metal particles are silver particles. 
   
   
       7 . The method for forming an electrode according to  claim 1 , wherein the ultraviolet absorber is a benzotriazole derivative or a hydroxyphenyltriazine derivative.