Patent ID: 11862672
Assignee: ROHM CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A semiconductor device comprising:
a first conductive-type semiconductor layer having a front surface, a back surface and end surfaces surrounding the front surface and the back surface, the semiconductor layer having a semiconductor element structure at a side of the front surface;
a surface electrode connected to an electrode of the semiconductor element structure;
an insulating layer formed on the front surface, a part of the surface electrode exposed from the insulating layer as a pad area, wherein
a maximum applied voltage (BV) Y (≥1000 V) of the semiconductor element structure and a distance X1 from an end of the pad area to the end surface of the semiconductor layer satisfy the following relational expression (1):, [
  
   Numerical
   ⁢
      
   expression
   ⁢
      
   1
  
  ]
 

 
  
   
    
     
      (
      
       
        855
        ·
        ln
       
       ⁢
       
        Y
        1053
       
      
      )
     
     ≦
     
      X
      ⁢
      1
     
     ≦
     
      
       (
       
        
         855
         ·
         ln
        
        ⁢
        
         Y
         1053
        
       
       )
      
      +
      100.
     
    
   
   
    
     (
     1
     )