Electrically Conductive Material

Abstract

An electrically conductive material includes: a supersaturated solid solution of a polycrystalline copper alloy having a composition represented by the formula: Cu 100-x-y M x N y ; wherein x and y are atomic ratios; wherein 0<x≦2.0 and 0≦y≦2.0; wherein M is selected from Ru, Re, Ho, and combinations thereof; and wherein the supersaturated solid solution includes M precipitates formed at grain boundaries of the polycrystalline copper alloy when y is equal to zero, and includes M precipitates and MN particles formed at the grain boundaries of the polycrystalline copper alloy when y is not zero.

1 . An electrically conductive material comprising:
 a supersaturated solid solution of a polycrystalline copper alloy having a composition represented by the formula:
   Cu 100-x-y M x N y ; 
   wherein x and y are atomic ratios;   wherein 0<x≦2.0 and 0≦y≦2.0;   wherein M is selected from the group consisting of Ru, Re, Ho, and combinations thereof.   
   
   
       2 . The electrically conductive material of  claim 1 , wherein said supersaturated solid solution includes M precipitates formed at grain boundaries of said polycrystalline copper alloy when y is equal to zero, and includes M precipitates and MN particles formed at the grain boundaries of said polycrystalline copper alloy when y is not zero. 
   
   
       3 . The electrically conductive material of  claim 1 , wherein said polycrystalline copper alloy is an annealed material that is annealed at a temperature ranging from 200° C. to 750° C. 
   
   
       4 . The electrically conductive material of  claim 1 , wherein said polycrystalline copper alloy has a crystal grain size ranging from 30 nm to 150 nm. 
   
   
       5 . The electrically conductive material of  claim 1 , wherein M is Ru, 0<x≦2.0, and y=0. 
   
   
       6 . The electrically conductive material of  claim 5 , wherein said polycrystalline copper alloy is an annealed material that is annealed at a temperature ranging from 300° C. to 580° C. 
   
   
       7 . The electrically conductive material of  claim 1 , wherein M is Ru, 0<x≦2.0, and 0.01≦y≦2.0. 
   
   
       8 . The electrically conductive material of  claim 7 , wherein said polycrystalline copper alloy is an annealed material that is annealed at a temperature ranging from 300° C. to 680° C. 
   
   
       9 . The electrically conductive material of  claim 1 , wherein M is Re, 0<x≦2.0, and y=0. 
   
   
       10 . The electrically conductive material of  claim 9 , wherein said polycrystalline copper alloy is an annealed material that is annealed at a temperature ranging from 300° C. to 560° C. 
   
   
       11 . The electrically conductive material of  claim 1 , wherein M is Re, 0<x≦2.0, and 0.01≦y≦2.0. 
   
   
       12 . The electrically conductive material of  claim 11 , wherein said polycrystalline copper alloy is an annealed material that is annealed at a temperature ranging from 300° C. to 730° C. 
   
   
       13 . The electrically conductive material of  claim 1 , wherein M is Ho, 0<x≦2.0, and 0.01≦y≦2.0. 
   
   
       14 . The electrically conductive material of  claim 13 , wherein said polycrystalline copper alloy is an annealed material that is annealed at a temperature ranging from 300° C. to 660° C.