EXHIBIT 23(A)
                                                                   -------------






                              ACCOUNTANTS' CONSENT


The Board of Directors
Spire Corporation:


       We consent to incorporation by reference in the registration statement on
Form S-8 of Spire Corporation and subsidiaries of our report dated March 20,
2003, relating to the consolidated balance sheets of Spire Corporation as of
December 31, 2002 and 2001, and the related consolidated statements of
operations, stockholders' equity, and cash flows for each of the years in the
three year period ended December 31, 2002, which report appears in the December
31, 2002, annual report on Form 10-KSB of Spire Corporation.

KPMG LLP

Boston, Massachusetts
March 20, 2003