<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FOR THE THREE
MONTHS ENDED JUNE 28, 1998 AND IS QUALIFIED IN ITS ENTIRETY BY REFERENCE TO SUCH
FINANCIAL STATEMENTS.
</LEGEND>
       
                             
<PERIOD-TYPE>                   3-MOS
<FISCAL-YEAR-END>                          DEC-31-1997
<PERIOD-END>                               JUN-28-1998
<CASH>                                      19,096,000
<SECURITIES>                                22,171,000
<RECEIVABLES>                               12,326,000
<ALLOWANCES>                                         0
<INVENTORY>                                 20,651,000
<CURRENT-ASSETS>                            73,184,000
<PP&E>                                     111,086,000
<DEPRECIATION>                              35,765,000
<TOTAL-ASSETS>                             157,994,000
<CURRENT-LIABILITIES>                       10,067,000
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       147,000
<OTHER-SE>                                 145,858,000
<TOTAL-LIABILITY-AND-EQUITY>               157,994,000
<SALES>                                     22,675,000
<TOTAL-REVENUES>                            22,675,000
<CGS>                                       14,565,000
<TOTAL-COSTS>                               14,565,000
<OTHER-EXPENSES>                             8,168,000
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                             570,000
<INCOME-PRETAX>                                512,000
<INCOME-TAX>                                   192,000
<INCOME-CONTINUING>                            320,000
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                                   320,000
<EPS-PRIMARY>                                      .02
<EPS-DILUTED>                                      .02