Ex parte VAN DEN BROEK et al. - Page 10

          Appeal No. 1997-4442                                                         
          Application 08/353,040                                                       

          portions to be of "substantially the same composition" with                  
          one path portion having a positive TCR and one path portion                  
          having a negative TCR.  The paths in Mcquaid are made of                     
          different compositions, NiCrAl and CrSi.  Therefore, assuming,               
          arguendo, that it would have been obvious to replace the                     
          semiconductor materials of de Wit with the materials of                      
          Mcquaid, the Examiner has failed to establish a prima facie                  
          case of obviousness with respect to claims 3 and 5.                          

               Claims 2-6 - Drabkin and Sahagen                                        
               Sahagen is applied only to show TiW as a bonding layer.                 
          This limitation occurs only in claim 4, which is not argued.                 
          Thus, we need only address Drabkin.                                          
               Drabkin discloses a precision resistor with resistive                   
          material patterns 21 and 22 having opposite curvatures and                   
          slopes of TCR characteristics made of nickel-chrome alloys on                
          an electrically insulating substrate (col. 11, lines 19-37).                 
          On the side margins 18 of each of these patterns are paths 19                
          of cut and uncut copper-nickel-gold plated shunts 17 to permit               
          final R (resistance) trimming and shunts 16 to permit final                  
          TCR trimming (col. 11, lines 42-46).                                         

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