Conductive paste, method for manufacturing laminated ceraminc electronic component, and laminated ceramic electronic component

Abstract

Provided is a Ag-based conductive paste for a terminal electrode which suppresses oxidation of the Ni surface of an internal conductor and therefore brings about excellent joining with Ni even when baking is performed in the atmosphere in the case where Ni is used as the internal conductor of a laminated ceramic electronic component. The conductive paste includes at least one of an Ag powder and an Ag alloy powder, a nickel boride powder, an inorganic binder and an organic vehicle, wherein the quantity of the nickel boride powder is within the range of about 5% by weight or more, but less than about 60% by weight of the total paste.

What is claimed is:  
     
         1 . A conductive paste comprising: 
 at least one of an Ag powder and an Ag alloy powder;    a nickel boride powder;    an inorganic binder; and    an organic vehicle,    wherein the quantity of the nickel boride powder is within the range of about 5% by weight or more but less than about 60% by weight of the total paste.    
     
     
         2 . The conductive paste according to  claim 1 , wherein the average particle diameter of the nickel boride powder is about 150 μm or less.  
     
     
         3 . The conductive paste according to  claim 2 , wherein the inorganic binder is at least one member selected from the group consisting of bismuth borate glass, bismuth borosilicate glass and zinc borosilicate glass.  
     
     
         4 . The conductive paste according to  claim 1 , wherein the inorganic binder is at least one member selected from the group consisting of bismuth borate glass, bismuth borosilicate glass and zinc borosilicate glass.  
     
     
         5 . A method for manufacturing a laminated ceramic electronic component, comprising providing a sintered laminate comprising a plurality of ceramic plies and at least one conductor comprising nickel between a pair of said plies, applying a coating of the conductive paste according to  claim 4  in order to electrically connect to the conductor of the sintered laminate and baking so as to form a terminal electrode  
     
     
         6 . A method for manufacturing a laminated ceramic electronic component according to  claim 5 , wherein the ceramic plies are dielectric.  
     
     
         7 . A method for manufacturing a laminated ceramic electronic component according to  claim 5 , wherein the ceramic plies are semiconductive.  
     
     
         8 . A method for manufacturing a laminated ceramic electronic component, comprising providing a sintered laminate comprising a plurality of ceramic plies and at least one conductor comprising nickel between a pair of said plies, applying a coating of the conductive paste according to  claim 3  in order to electrically connect to the conductor of the sintered laminate and baking so as to form a terminal electrode  
     
     
         9 . A method for manufacturing a laminated ceramic electronic component according to  claim 8 , wherein the ceramic plies are dielectric.  
     
     
         10 . A method for manufacturing a laminated ceramic electronic component according to  claim 8 , wherein the ceramic plies are semiconductive.  
     
     
         11 . A method for manufacturing a laminated ceramic electronic component, comprising providing a sintered laminate comprising a plurality of ceramic plies and at least one conductor comprising nickel between a pair of said plies, applying a coating of the conductive paste according to  claim 2  in order to electrically connect to the conductor of the sintered laminate and baking so as to form a terminal electrode  
     
     
         12 . A method for manufacturing a laminated ceramic electronic component according to  claim 11 , wherein the ceramic plies are dielectric.  
     
     
         13 . A method for manufacturing a laminated ceramic electronic component according to  claim 11 , wherein the ceramic plies are semiconductive.  
     
     
         14 . A method for manufacturing a laminated ceramic electronic component, comprising providing a sintered laminate comprising a plurality of ceramic plies and at least one conductor comprising nickel between a pair of said plies, applying a coating of the conductive paste according to  claim 1  in order to electrically connect to the conductor of the sintered laminate and baking so as to form a terminal electrode  
     
     
         15 . A method for manufacturing a laminated ceramic electronic component according to  claim 14 , wherein the ceramic plies are dielectric.  
     
     
         16 . A method for manufacturing a laminated ceramic electronic component according to  claim 14 , wherein the ceramic plies are semiconductive.  
     
     
         17 . A laminated ceramic electronic component manufactured by the method for manufacturing a laminated ceramic electronic component according to  claim 14 .  
     
     
         18 . The laminated ceramic electronic component according to  claim 18 , wherein the ceramic is a dielectric ceramic.  
     
     
         19 . The laminated ceramic electronic component according to  claim 18 , wherein the ceramic is a semiconductor ceramic