Ex parte TSAI et al. - Page 5




          Appeal No. 2000-1810                                                        
          Application No. 09/148,556                                                  


          exemplifies for comparison a composition comprising boron                   
          trichloride, hydrogen chloride and chlorine.  As argued by                  
          appellant, Cote does not disclose the claimed gaseous etchant               
          comprising boron trichloride and an oxygen containing                       
          compound.                                                                   




























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