<ARTICLE> 5
<LEGEND>
THIS SCHEDULE CONTAINS SUMMARY FINANCIAL INFORMATION EXTRACTED FOR THE THREE
MONTHS ENDED MARCH 29, 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>                               MAR-29-1998
<CASH>                                      17,496,000
<SECURITIES>                                23,161,000
<RECEIVABLES>                               13,655,000
<ALLOWANCES>                                         0
<INVENTORY>                                 22,926,000
<CURRENT-ASSETS>                            74,126,000
<PP&E>                                     108,337,000
<DEPRECIATION>                              32,787,000
<TOTAL-ASSETS>                             160,777,000
<CURRENT-LIABILITIES>                       13,605,000
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       147,000
<OTHER-SE>                                 145,258,000
<TOTAL-LIABILITY-AND-EQUITY>               160,777,000
<SALES>                                     18,785,000
<TOTAL-REVENUES>                            18,785,000
<CGS>                                       12,068,000
<TOTAL-COSTS>                               12,068,000
<OTHER-EXPENSES>                             9,087,000
<LOSS-PROVISION>                                     0
<INTEREST-EXPENSE>                           (656,000)
<INCOME-PRETAX>                            (1,714,000)
<INCOME-TAX>                                 (643,000)
<INCOME-CONTINUING>                        (1,071,000)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (1,071,000)
<EPS-PRIMARY>                                   (0.07)
<EPS-DILUTED>                                   (0.07)