Patent ID: 11931854
Assignee: APPLIED MATERIALS, INC.
Field: Machine tools (Mechanical engineering)
Classification: CPC B  H | IPC B  H

Claim 4:
5. The system of claim 4, wherein the first duration T1 and the second duration T2 satisfy, P
    DES
  
  =
  
    P
    ⁡
    
      [
      
        1
        -
        
          
            S
            1
          
          ⁡
          
            (
            
              
                T
                2
              
              
                
                  T
                  1
                
                +
                
                  T
                  2
                
              
            
            )
          
        
      
      ], where P is a polishing rate of the edge portion without using the polishing control groove, PDES is a desired polishing rate, and, S
    1
  
  =
  
    α
    180, where α is the angle subtended across the substrate by the polishing control groove relative to the center of the substrate.