================================================================================ SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 FORM 8-K Current Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 Date of Report (Date of Earliest Event Reported) April 28, 2000 ----------------------- ADE Corporation - -------------------------------------------------------------------------------- (Exact Name of Registrant as Specified in its Charter) Massachusetts - -------------------------------------------------------------------------------- (State or Other Jurisdiction of Incorporation) 0-26714 04-2441829 - -------------------------------------------------------------------------------- (Commission File Number) (I.R.S. Employer I.D. No.) 80 Wilson Way, Westwood, Massachusetts 02090 - -------------------------------------------------------------------------------- (Address of Principal Executive Offices, Including Zip Code) (617) 467-3500 - -------------------------------------------------------------------------------- (Registrant's Telephone Number, Including Area Code) Not Applicable - -------------------------------------------------------------------------------- (Former Name or Former Address, if Changed Since Last Report) ================================================================================ Item 5. Other Events Effective April 28, 2000, Daniel F. Harrington resigned as the Chief Financial Officer of ADE Corporation ("ADE"). On May 1, 2000, ADE issued a press release, attached as Exhibit 1, announcing Mr. Harrington's resignation. The information contained in the press release is incorporated herein by reference. -2- SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized. ADE CORPORATION Date: May 1, 2000 By: /s/ Robert C. Abbe --------------------------------------- Robert C. Abbe President and Chief Executive Officer -2- CURRENT REPORT ON FORM 8-K ADE CORPORATION EXHIBIT INDEX Exhibit Number Description of Exhibit ------ ---------------------- 1 Press Release dated May 1, 2000 -3-