EXHIBIT 99.2


                           CERTIFICATION PURSUANT TO
                            18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                 SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002


In connection with the Quarterly Report of PDF Solutions, Inc. (the "Company")
on Form 10-Q for the period ended March 31, 2003 as filed with the
Securities and Exchange Commission on the date hereof (the "Report"), I, P.
Steven Melman, Chief Financial Officer of the Company, certify, pursuant to 18
U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley
Act of 2002, that:

     (1) The Report fully complies with the requirements of section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

     (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and result of operations of the
Company.

/s/ P. Steven Melman

P. Steven Melman
Chief Financial Officer
May 14, 2003