Patent ID: 11927620
Assignee: CHANGXIN MEMORY TECHNOLOGIES, INC.
Field: Computer technology (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 4:
5. The method for simulating electricity of a wafer chip of claim 4, wherein a formula for comparing the test electrical data with the actual electrical data of the test wafer chip to obtain the value of correlation between the test electrical data and the actual electrical data is:, R
    2
  
  =
  
    1
    -
    
      
        
          Σ
          ⁡
          
            (
            
              
                Y
                
                  a
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              -
              
                Y
                predict
              
            
            )
          
        
        2
      
      
        
          Σ
          ⁡
          
            (
            
              
                Y
                
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                Y
                
                  m
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            )
          
        
        2
      
    
  

where Yactual is the actual electrical data, Ypredict is the test electrical data, Ymean is an average value of the actual electrical data, and R2 is the value of correlation.