Patent ID: 11897077
Assignee: KIOXIA CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC B  H | IPC B  H

Claim 0:
1. A semiconductor manufacturing apparatus comprising:
a rotatable first top ring configured to hold a wafer having a film;
a rotatable first turntable having a polishing pad arranged to perform polishing of the film;
a sound sensor configured to measure a first sound generated during the polishing; and
a controller configured to calculate a polishing amount of the film based on (i) a first sound pressure of the first sound, (ii) a polishing amount per unit time of the polishing, and (iii) an elapsed time of the polishing, wherein a prediction value of the polishing amount is determined based on the first sound pressure during polishing, a second sound pressure before polishing, and the polishing amount per unit time according to Equation (2),, Prediction
      ⁢
         
      value
      ⁢
         
      of
      ⁢
         
      polishing
      ⁢
         
      amount
     
     =
     
      
       ∑
       
        t
        =
        1
       
       n
      
      
       (
       
        
         ∫
         
          f
          ⁢
          1
         
         
          f
          2
         
        
        
         
          (
          
           
            Sound
            ⁢
               
            pressure
            ⁢
               
            during
            ⁢
               
            polishing
           
           -
           
            Sound
            ⁢
               
            pressure
            ⁢
               
            before
            ⁢
               
            polishing
           
          
          )
         
         ×
         Polishing
         ⁢
            
         amount
         ⁢
            
         per
         ⁢
            
         unit
         ⁢
            
         time
        
       
       )
      
     
    
   
   
    
     (
     2
     )