Exhibit 1 Filing Agreement dated December 23, 1998 Re: Joint Filing of Schedule 13D The undersigned hereby agree that: (i) each of them is individually eligible to use the Schedule 13D attached hereto; (ii) the attached Schedule 13D is filed on behalf...

 
                                   Exhibit 1

                    Filing Agreement dated December 23, 1998
                        Re: Joint Filing of Schedule 13D

The undersigned hereby agree that:

        (i)         each of them is individually eligible to use the Schedule
                    13D attached hereto;
        
        (ii)        the attached Schedule 13D is filed on behalf of each of
                    them;
        
        (iii)       each of them is responsible for the timely filing of such
                    Schedule 13D and any amendments thereto, and for the
                    completeness and accuracy of the information therein
                    concerning itself; but none of them is responsible for the
                    completeness and accuracy of the information concerning the
                    other persons making the filing, unless it knows or has
                    reason to believe that such information is inaccurate.


                                    ROHM AND XXXX COMPANY
        
        
                                    By: /s/ Xxxxxx X. Xxxxx
                                       ------------------------
                                    Name: Xxxxxx X. Xxxxx
                                    Title: Vice President and General Counsel
        
        
                                    LIGHTNING ACQUISITION CORP.
        
        
                                    By: /s/ Xxxxxxx X. Xxxxxx
                                       ------------------------
                                    Name: Xxxxxxx X. Xxxxxx
                                    Title: Vice President

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