AMENDMENT NO. 4
KULICKE AND SOFFA INDUSTRIES, INC.
1999 NONQUALIFIED EMPLOYEE STOCK OPTION PLAN
WHEREAS, Kulicke and Soffa Industries, Inc. (the "Company") established the Kulicke and Soffa Industries,
Inc. 1999 Nonqualified Employee Stock Option Plan (the "Plan"), effective September 28, 1999, and amended
the Plan on three occasions thereafter, including an amendment to adjust the number of shares to reflect a stock
split pursuant to resolutions of the Compensation Committee of the Company;
WHEREAS, the Company reserved the right to amend the Plan at any time, subject to certain inapplicable
WHEREAS, the Company desires to amend the Plan to provide the Company with greater flexibility in setting
the vesting criteria applicable to options granted thereunder;
NOW, THEREFORE, effective as of October 2, 2001, Section 5(b)(4)(A) of the Plan is hereby amended to
read as follows:
(A) General. Options shall be exercisable in such installments, on such dates, and/or upon fulfillment of such other
conditions as the Committee may specify, provided that:
* * * * *
IN WITNESS WHEREOF, Kulicke and Soffa Industries, Inc. has caused this Amendment No. 4 to be
executed this 2nd day of October, 2001.
[Seal] KULICKE AND SOFFA INDUSTRIES, INC.
Attest: __________________ By: ________________________________