EX-23.1 3 asys-ex231x93013.htm CONSENT OF INDEPENDENT REGISTERED ACCOUNTANTS
Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTANTS
As independent registered public accountants, we hereby consent to the incorporation by reference in Registration Statement Nos. 333-139592, 333-140372, 333-146856, and 333-147440 on Form S-1, Nos. 333-09917, 333-10117, 333-47098, and 333-131044 on Form S-3, and Nos. 333-09909, 333-09911, 333-46086, 333-76812, 333-103101, 333-131051, 333-145454, 333-168606 and 333-168607 on Form S-8 of our report dated December 11, 2013, relating to the consolidated balance sheets of Amtech Systems, Inc. as of September 30, 2013 and 2012 and the related consolidated statements of operations, comprehensive income (loss), stockholders' equity and cash flows for each of the years in the three-year period ended September 30, 2013, included in the Annual Report on Form 10-K of Amtech Systems, Inc. for the year ended September 30, 2013. It should be noted that we have not audited any consolidated financial statements of the company subsequent to September 30, 2013, or performed any audit procedures subsequent to the date of our report.

| /s/ MAYER HOFFMAN MCCANN P.C.
Phoenix, Arizona |
December 11, 2013 |