EXHIBIT 23.1 INDEPENDENT AUDITORS' CONSENT The Board of Directors Ibis Technology Corporation We consent to incorporation by reference in the Registration Statement (No. 333-82497) on Form S-3 of Ibis Technology Corporation of our report dated February 12, 1999, relating to the balance sheets of Ibis Technology Corporation as of December 31, 1998, and 1997, and the related statements of operations, stockholders' equity, and cash flows for each of the years in the three-year period ended December 31, 1998, which report appears in the December 31, 1998, annual report on Form 10-K of Ibis Technology Corporation and to the reference to our firm under the heading "Experts". /S/ KPMG LLP Boston, Massachusetts July 23, 1999