Metal wire structure with high-melting-point protective layer and its manufacturing method

Abstract

The present invention presents a metal wire structure with high-melting-point protective layer and its manufacturing method, of which the structure comprising: a core and a protective layer; the core is made of metal, and the protective layer made of metal carbide or metal nitride. The manufacturing method includes the following steps: preparation, discharge and finish. The protective layer is gradually bonded onto the exterior surface of the core until a preset thickness of the protective layer, and then fully covered onto the core through a plating process of discharge reaction at temperature over 5000□. With this design, the present invention has advantages and efficacies such as: without generation of silicide and producing protective effects.

1 . A manufacturing method of metal wire structure with high-melting-point protective layer comprising the following steps:
 preparation step: preparing a core and a discharge device, of which the core in a threaded shape is made of metal material; said discharge device being provided with a positive electrode, a negative electrode, a discharge reaction tank, a discharge processing medium, an electrode fixed portion and a discharge reaction member; said discharge processing medium being placed into said discharge reaction tank, said electrode fixed portion being used to fix said core, which is linked to said negative electrode; said discharge reaction member made of metal being linked to said positive electrode; a preset discharge gap being defined between said core and said discharge reaction member, and filled with said discharge processing medium; said discharge processing medium consisting of either carbon atom or nitrogen atom;   discharge step: said discharge device being activated to enable electrical discharge of said core and said discharge reaction member; a local temperature in this discharge process being over 5000□, so metal atoms of said core impinging dispersedly on an exterior surface of said discharge reaction member, meanwhile the metal atoms of said discharge reaction member being combined with atoms in said discharge processing medium, and impinging dispersedly on said exterior surface of said core, so a protective layer being gradually formed on said exterior surface of said core;   finish step: a metal wire structure with high-melting-point protective layer being made which comprises:
 a core which is made of metal material and is shaped as a thread; 
 a protective layer which is made of either metal carbide or metal nitride; 
   said protective layer being gradually bonded onto an exterior surface of said core until a preset thickness, and then fully covered onto said core through a plating process of discharge reaction at temperature over 5000□.   
     
     
         2 . The method defined in  claim 1 , wherein said discharge reaction member is made of W, Pt, Pd, Mo, Ti, Nb, Ta, Co, Ni, Cr, Mn tungsten alloy, platinum alloy, palladium alloy, molybdenum alloy, titanium alloy, niobium alloy, tantalum alloy, cobalt alloy, nickel alloy, chrome alloy, or manganese alloy. 
     
     
         3 . A metal wire structure with high-melting-point protective layer comprising:
 a core which is made of metal material and is shaped as a thread;   a protective layer which is made of either metal carbide or metal nitride; said protective layer being gradually bonded onto an exterior surface of said core until a preset thickness, and then fully covered onto said core through a plating process of discharge reaction at temperature over 5000□.   
     
     
         4 . The structure defined in  claim 3 , wherein said core is made of W, Pt, Pd, Mo, Ti, Nb, Ta, Co, Ni, Cr, Mn, tungsten alloy, platinum alloy, palladium alloy, molybdenum alloy, titanium alloy, niobium alloy, tantalum alloy, cobalt alloy, nickel alloy, chrome alloy, or manganese alloy. 
     
     
         5 . The structure defined in  claim 3 , wherein said protective layer is made of metal carbide containing W, Pt, Pd, Mo, Ti, Nb, Ta, Co, Ni, Cr, Mn, tungsten alloy, platinum alloy, palladium alloy, molybdenum alloy, titanium alloy, niobium alloy, tantalum alloy, cobalt alloy, nickel alloy, chrome alloy, or manganese alloy. 
     
     
         6 . The structure defined in  claim 3 , wherein said protective layer is made of metal nitride containing W, Pt, Pd, Mo, Ti, Nb, Ta, Co, Ni, Cr, Mn, tungsten alloy, platinum alloy, palladium alloy, molybdenum alloy, titanium alloy, niobium alloy, tantalum alloy, cobalt alloy, nickel alloy, chrome alloy, or manganese alloy.