Molten salt bath for electroforming and method of manufacturing metal product using the same

Abstract

A molten salt bath for electroforming containing lithium bromide, cesium bromide and a halide of an alkali metal and/or a halide of an alkaline-earth metal is provided. In addition, a method of manufacturing a metal product including the steps of: forming a resist pattern on a conductive substrate and exposing a portion of the conductive substrate; immersing the conductive substrate having the resist pattern formed into the molten salt bath for electroforming, the molten salt bath for electroforming containing a metal to be precipitated and/or a compound of a metal to be precipitated; and precipitating the metal at a portion where the conductive substrate is exposed, is provided. Further, a molten salt bath for electroforming obtained by mixing lithium bromide, cesium bromide, and a halide of an alkali metal and/or a halide of an alkaline-earth metal is provided.

What is claimed is:  
     
         1 . A molten salt bath for electroforming, containing lithium bromide, cesium bromide, and a halide of an alkali metal and/or a halide of an alkaline-earth metal.  
     
     
         2 . The molten salt bath for electroforming according to  claim 1 , wherein 
 said halide of the alkali metal is potassium bromide.    
     
     
         3 . The molten salt bath for electroforming according to  claim 1 , wherein 
 a sum of a mole fraction of said lithium bromide and a mole fraction of said cesium bromide is set to be within a range from at least 0.5 to less than 0.95 with respect to entire said molten salt bath for electroforming.    
     
     
         4 . The molten salt bath for electroforming according to  claim 1 , wherein 
 a mole ratio of said lithium bromide to said cesium bromide (lithium bromide/cesium bromide) is set to be within a range from at least 1.8 to at most 2.5.    
     
     
         5 . The molten salt bath for electroforming according to  claim 1 , wherein 
 said molten salt bath for electroforming has a eutectic composition.    
     
     
         6 . A method of manufacturing a metal product, comprising the steps of: 
 forming a resist pattern on a conductive substrate and exposing a portion of said conductive substrate;    immersing said conductive substrate having said resist pattern formed into the molten salt bath for electroforming according to  claim 1 , the molten salt bath for electroforming containing a metal to be precipitated and/or a compound of a metal to be precipitated; and    precipitating said metal at a portion where said conductive substrate is exposed.    
     
     
         7 . The method of manufacturing a metal product according to  claim 6 , wherein 
 a temperature of said molten salt bath for electroforming is set to at most 300° C. in precipitating said metal.    
     
     
         8 . A molten salt bath for electroforming, obtained by mixing lithium bromide, cesium bromide, and a halide of an alkali metal and/or a halide of an alkaline-earth metal.