Ex Parte SCHEMMEL et al - Page 6



                    Appeal No. 2001-0953                                                                                                                                  
                    Application No. 08/923,651                                                                                                                            

                              silicon dies, automatically calculates a statistical                                                                                        
                              die model from a sample of silicon dies.                                                                                                    
                              The Examiner relies on Tanaka for the teaching of the above                                                                                 
                    limitations.  See pages 2 and 3 of the answer.                                                                                                        
                              Appellants respond to the Examiner by pointing out that                                                                                     
                    Tanaka does not teach the limitation of automatically calculating                                                                                     
                    a statistical die model from a sample of silicon dies.                                                                                                
                    Appellants point out that Tanaka teaches at the top of column 4                                                                                       
                    that only one die is scanned and that this die must be a flawless                                                                                     
                    die and from this flawless die parameters are derived.  See page                                                                                      
                    3 of the Appellants' reply brief.                                                                                                                     
                              Upon our review of Tanaka, we find that Tanaka teaches that                                                                                 
                    flawless wafer 1 is put on a moving mechanism 3.  The CCD camera                                                                                      
                    5 scans the flawless wafer 1 and the image data are stored to the                                                                                     
                    frame memory 8.  On the basis of these data, a set of fundamental                                                                                     
                    pattern vectors are generated.  See column 4, lines 1-10.  Upon                                                                                       
                    our complete review of Tanaka, we fail to find that Tanaka                                                                                            
                    teaches a computer that automatically obtains an image of a                                                                                           
                    plurality of silicon dies and automatically calculates a                                                                                              
                    statistical die model from a sample of silicon dies as recited in                                                                                     
                    Appellants' claims.                                                                                                                                   


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