AMENDMENT TO EMPLOYMENT AGREEMENT

Whereas, Amtech Systems, Inc. (“Company) and Jong S. Whang (“Executive”) entered
into an Employment Agreement (the “Agreement”) dated February 9, 2012; and

Whereas, Company and Executive now desire to modify the Agreement pursuant to
Paragraph 20 thereof, and to enter into this Amendment to Employment Agreement
(“Agreement”);

The parties hereto therefore agree to the following modification to the
Agreement, to be effective as of the date set forth below; with all unmodified
portions of the Agreement to remain in full force and effect as written:

1.Section 2 of the Agreement is hereby amended to reduce the annual base
compensation from $400,000 per annum to $320,000.

IN WITNESS WHEREOF, the parties hereto have executed this Amendment this _1st_
day of July, 2012.

Amtech Systems, Inc.

By   /s/ Bradley C. Anderson
Bradley C. Anderson,
                
Its Executive Vice President and Chief Financial Officer

By /s/ Jong S. Whang
Jong S. Whang, Executive