Exhibit 32.1

CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION

906 OF THE SARBANES-OXLEY ACT OF 2002

I, C. Scott Kulicke, the Chief Executive Officer of Kulicke and Soffa Industries, Inc., hereby 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 Annual Report on Form 10-K of Kulicke and Soffa Industries, Inc. for the fiscal year ended September 30, 2005 , which this certification accompanies, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. information contained in the Fiscal 2005 Form 10-K fairly presents, in all material respects, the financial condition and results of operations of Kulicke and Soffa Industries, Inc.

Dated: December 13, 2005

/s/ C. SCOTT KULICKE

C. Scott Kulicke

Chief Executive Officer