Type	Name	Date
Underwriting agreement	Underwriting Agreement	08/18/2017

Type	Name	Date
Employment agreement	Employment Agreement, by and between Bradley C. Anderson and the Company	04/10/2015
Employment agreement	Employment Agreement, by and between Paul J. van der Wansem and the Company	02/02/2015
Employment agreement	Amended and Restated Employment Agreement between the Company and Jong S. Whang	03/17/2010

Type	Name	Date
Merger agreement	Agreement and Plan of Merger, by and among Amtech Systems, Inc., BTU Merger Sub, Inc., and BTU International, Inc	10/23/2014