Patent ID: 11911854
Assignee: SENJU METAL INDUSTRY CO., LTD.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  C | IPC B  C

Claim 4:
5. The solder alloy according to claim 3, wherein said alloy composition satisfies the following equations (1) to (3):, 1.2
     <
     
      Sn
      /
      
       {
       
        
         
          (
          
           
            2
            ⁢
            
             6
             .
             8
            
            ⁢
            4
           
           73.16
          
          )
         
         ×
         Ag
        
        +
        
         
          (
          
           60.89
           39.11
          
          )
         
         ×
         Cu
         ×
         x
        
        +
        
         
          (
          
           38.37
           61.63
          
          )
         
         ×
         Cu
         ×
         
          (
          
           1
           -
           x
          
          )
         
        
        +
        
         
          (
          
           
            4
            ⁢
            
             9
             .
             3
            
            ⁢
            7
           
           50.63
          
          )
         
         ×
         Sb
        
       
       }
      
     
     ≦
     6.5
    
   
   
    
     equation
     ⁢
       
     
      (
      1
      )
     
    
   
  
 

 
  
   
    
     
      (
      
       2
       /
       3
      
      )
     
     ≤
     x
     ≤
     
      (
      
       1
       ⁢
       
        
         5
         .
         3
        
        /
        1
       
       ⁢
       6
       .3
      
      )
     
    
   
   
    
     equation
     ⁢
        
     
      (
      2
      )
     
    
   
  
 

 
  
   
    
     78
     ≤
     
      Ag
      ×
      Cu
      ×
      Sb
     
     ≤
     2029
    
   
   
    
     equation
     ⁢
        
     
      (
      3
      )
     
    
   
  
 

wherein Ag, Cu, and Sb each in the above equations (1) to (3) represent the content (mass %) in said alloy composition.