Method for preparing copper organic metal and copper paste

Abstract

The copper organic metal is constituted to combine a copper atom, [R—CO 2 ] and amine based ligand (L), thereby making it possible to be subjected to a low temperature sintering process and having an improved conductivity at the time of forming a conductive pattern.

What is claimed is: 
     
         1 . A method for preparing a copper organic metal having an amine based ligand comprising:
 preparing a first solution by dissolving alkanoic acid or fatty acid in an aqueous sodium hydroxide solution or an aqueous potassium hydroxide solution;   mixing the first solution and a second solution having a dissolved copper salt therein; and   separating and purifying a copper organic metal from the mixed solution including the first solution and the second solution.   
     
     
         2 . A method for preparing a copper organic metal having an amine based ligand comprising:
 preparing a first solution by dissolving alkanoic acid or fatty acid in an aqueous sodium hydroxide solution or an aqueous potassium hydroxide solution;   mixing the first solution and a second solution having a dissolved copper salt therein;   separating and purifying a copper organic metal from the mixed solution including the first solution and the second solution; and   reacting the separated and purified copper organic metal with amine based solvent.   
     
     
         3 . The method according to  claim 2 , wherein the amine based ligand includes alkylamine. 
     
     
         4 . The method according to  claim 3 , wherein the alkylamine is any one material selected from R—NH 2 , R—NH—R′ and R 3 —N. 
     
     
         5 . The method according to  claim 2 , wherein the amine based ligand includes a hydroxyl (—OH) group. 
     
     
         6 . The method according to  claim 2 , wherein the amine based ligand includes HO—R—NH 2 . 
     
     
         7 . A copper paste comprising:
 a copper powder; and   a copper organic metal prepared by the method for preparing a copper organic metal according to  claim 2 .