EXHIBIT 13.1 SELECTED CONSOLIDATED FINANCIAL DATA FIVE-YEAR SUMMARY Years ended December 31, (In thousands, except per share amounts) 2001 2000 1999 1998 1997 - ----------------------------------------------------------------------------------------------------------------------------- STATEMENTS OF OPERATIONS DATA: Net sales $ 839,376 $1,376,815 $ 836,623 $ 654,342 $ 631,114 Cost of sales 458,699 466,994 301,322 249,474 236,958 ------------------------------------------------------------- Gross margin 380,677 909,821 535,301 404,868 394,156 Research and development expenses 170,869 172,373 86,065 59,864 54,417 Selling, general, and administrative expenses 215,318 209,979 143,214 113,161 112,784 Acquired in-process research and development expense - 6,305 - - - Restructuring and other special charges 47,669 - - - - ------------------------------------------------------------- Income (loss) from operations (53,179) 521,164 306,022 231,843 226,955 Gain on sale of WaferTech, LLC - 178,105 - - - Interest and other income, net 40,176 46,145 37,055 12,340 2,616 ------------------------------------------------------------- Income (loss) before income taxes, equity investment, and cumulative effect of change in accounting principle (13,003) 745,414 343,077 244,183 229,571 Provision for income taxes 26,779 247,107 111,499 79,356 78,054 Equity in loss of WaferTech, LLC - 1,400 7,584 10,440 - Cumulative effect of change in accounting principle - - - - 18,064 ------------------------------------------------------------- Net income (loss) $ (39,782) $ 496,907 $ 223,994 $ 154,387 $ 133,453 ============================================================= Net income (loss) per share: Basic $ (0.10) $ 1.25 $ 0.57 $ 0.41 $ 0.38 Diluted (0.10) 1.19 0.54 0.39 0.34 Shares used in computing income (loss) per share: Basic 386,097 396,849 396,158 373,972 354,100 Diluted 386,097 416,629 414,928 406,356 410,464 BALANCE SHEET DATA: Working capital $ 882,421 $1,013,155 $ 785,359 $ 587,923 $ 430,371 Total assets 1,361,427 2,004,134 1,439,599 1,093,331 952,518 Long-term debt - - - - 230,000 Stockholders' equity 1,114,500 1,247,930 1,118,073 881,721 536,687 Book value per share 2.89 3.21 2.81 2.26 1.50