<ARTICLE> 5
<LEGEND>
This schedule contains summary financial information extracted for the six
month period ended July 4, 1999 and is qualified in its entirety by reference
to such financial statements.
</LEGEND>

                             
<PERIOD-TYPE>                   6-MOS
<FISCAL-YEAR-END>                          DEC-31-1999
<PERIOD-END>                               JUL-04-1999
<CASH>                                      25,343,000
<SECURITIES>                                14,736,000
<RECEIVABLES>                               18,191,000
<ALLOWANCES>                                         0
<INVENTORY>                                 10,256,000
<CURRENT-ASSETS>                            83,173,000
<PP&E>                                     131,397,000
<DEPRECIATION>                              56,117,000
<TOTAL-ASSETS>                             169,255,000
<CURRENT-LIABILITIES>                       29,646,000
<BONDS>                                              0
<PREFERRED-MANDATORY>                                0
<PREFERRED>                                          0
<COMMON>                                       149,000
<OTHER-SE>                                 134,660,000
<TOTAL-LIABILITY-AND-EQUITY>               169,255,000
<SALES>                                     55,582,000
<TOTAL-REVENUES>                            55,582,000
<CGS>                                       36,148,000
<TOTAL-COSTS>                               36,148,000
<OTHER-EXPENSES>                            20,712,000
<LOSS-PROVISION>                               (6,925)
<INTEREST-EXPENSE>                           (995,000)
<INCOME-PRETAX>                            (7,208,000)
<INCOME-TAX>                               (2,667,000)
<INCOME-CONTINUING>                        (4,541,000)
<DISCONTINUED>                                       0
<EXTRAORDINARY>                                      0
<CHANGES>                                            0
<NET-INCOME>                               (4,541,000)
<EPS-BASIC>                                     (0.31)
<EPS-DILUTED>                                   (0.31)