Workers at Carl Zeiss SMT stand in front of a

Workers at Carl Zeiss SMT stand in front of a vacuum chamber used to test a system of highly polished mirrors, in Oberkochen, Germany, in this undated handout photo. Zeiss is developing optical systems that will go into the newest tool being developed by ASML of the Netherlands to create a new generation of computer chips. Helmut Issler ZEISS/Handout via Reuters