Ex parte SCHLANGENOTTO et al. - Page 2

          Appeal No. 96-0341                                                          
          Application 08/005,760                                                      

          3 was amended.  In an Advisory Action (paper number 16), the                
          examiner indicated that the amendment had the effect of                     
          overcoming the indefiniteness rejection of claim 3, and that                
          claim 3 was allowed.  Accordingly, claims 1, 2 and 4 through 14             
          remain before us on appeal.                                                 
               The disclosed invention relates to a power diode that has a            
          base zone that is divided into at least two diode regions.  The             
          first region of the base zone is of a first predetermined                   
          thickness, and is dimensioned for a given blocking voltage.  The            
          second region of the base zone is of a second thickness that is             
          greater than the first predetermined thickness by at least a                
          factor of 1.4.  The first diode region has a first area and a               
          first minority carrier lifetime, and the second diode region has            
          a second area and a second minority carrier lifetime.  The diode            
          region areas are dimensioned such that a forward current flowing            
          through the first diode is greater than a forward current flowing           
          through the second diode by at least a factor of 2.  According to           
          the disclosed and claimed invention, a greater amount of forward            
          current flows through the first diode region because it is                  
          thinner than the second diode region.                                       
               Claim 1 is the only independent claim on appeal, and it                
          reads as follows:                                                           


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