Patent ID: 11869753
Assignee: TOKYO ELECTRON LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 5:
6. The plasma processing apparatus of claim 1,
wherein a diameter φD of a through hole through which a leading end of the first sensor provided in the first member passes and/or a through hole through which a leading end of the second sensor provided in the second member passes, and a length t of the through hole are designed such that an attenuation amount (A) calculated from a following expression (1) becomes equal to or larger than a preset threshold value:, [
      
       Expression
       ⁢
          
       1
      
      ]
     
                                                                                                      
    
   
   
     
   
  
 

 
  
   
    
     A
     =
     
      
       20
       ⁢
       
        
         log
         10
        
        (
        
         
          α
          ⁢
          λ
         
         
          ϕ
          ⁢
          
           D
           3
          
         
        
        )
       
      
      +
      
       
        
         β
         ·
         t
        
        
         ϕ
         ⁢
         D
        
       
       .
      
     
    
   
   
    
     Expression
     ⁢
        
     1