Ex parte KOMATSU - Page 8




          Appeal No. 1997-4033                                                        
          Application No. 08/589,584                                                  



               a third cladding layer covering a top surface of said                  
          second cladding layer and sloped side walls of laminations of               
          said buffer layer, multiple quantum well optical wave-guide                 
          layer, and second cladding layer; and                                       
               a cap layer formed on a top surface of said third                      
          cladding layer;                                                             
               a dielectric film covering at least an entire surface of               
          said ridge-shaped optical wave-guide; and                                   
               two top electrodes extending over an entire part of said               
          two parallel straight phase modulator sections.                             
          The references and rejection                                                
               The examiner relies on the following references:                       
               Sasaki et al. (Sasaki), Novel Structure Photonic Devices               
          Using Selective MOVPE Growth, 33 NEC Research & Development                 
          372-82 (1992).                                                              
               Rolland et al. (Rolland), 10 Gbits/s, 1.56um MULTIQUANTUM              
          WELL InP/InGaAsP MACH-ZEHNDER OPTICAL MODULATOR, 29                         
          Electronics Letters 471-72 (1993).                                          
               Claims 22-26 stand rejected under 35 U.S.C.  103 as                   
          unpatentable for obviousness over Rolland and Sasaki.                       


          The merits of the examiner's 35 U.S.C.  103 rejection                      
               The 35 U.S.C.  103 rejection is unsustainable even                    
          assuming the claims are accurate to call for the MQW structure              



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