Postdoctoral Researcher -- Nanolayer Extreme UV membranes

Research / Academic

We are looking for a highly motivated and skilled post-doctoral researcher to carry out a project on stacked films of nanoscale thickness. In the form of freestanding, ultrathin membranes these are currently being developed for protection of sensitive surfaces in EUV photolithography. Though early demonstrations have been shown for various membrane stack concepts, successful industrial application still requires further improvements of the membrane properties. Specifically, the membranes should be sufficiently thin to allow high transmission of EUV light, but still remain strong enough to prevent mechanical failure. In addition, the lifetime of such membranes is intrinsically linked to thermal loading under EUV illumination in a chemically active environment.         

The Industrial Focus Group XUV Optics at MESA+ has now started a new multidisciplinary research programme to study the thin film physics and chemistry of transmissive Extreme UV optics. Forefront fundamental research, relevant to the application, has been developed by this group ( The research will take place in a state-of-the-art thin film laboratory within the MESA+ Institute for Nanotechnology at the University of Twente, in collaboration with the lithography equipment manufacturer ASML.


As a post-doc researcher in this project:

  • You are an excellent team player in an enthusiastic group of scientists and engineers working on thin film physics and chemistry.
  • Your goal is to develop the key material science required for making nanoscale-thin, EUV transparent membranes.
  • This includes new types of membrane structures that combine strength and transparancy, using functional layers to meet requirements on mechanical strength, heat dissipation and chemical inertness.
  • You will understand and control the growth and characterization of candidate materials, synthesizing membranes, using state-of-the-art clean room and thin film facilities.
  • You will investigate the relation between the microstructure of the materials and their macroscopic properties, including the thin film physics aspects associated.
  • You will collaborate intensively with lithography equipment manufacturer ASML (Veldhoven) and miscellaneous other parties in regular meetings and work visits.


  • You have a PhD in physics, materials science, physical chemistry or engineering or a related field.
  • You have affinity with the realization of physical or chemical depositions of nanoscale thin films (MEMS, CMOS or related) and their analysis (optical and mechanical).
  • You have excellent cleanroom nano fabrication or general clean room process skills.
  • You are creative, like to push boundaries, and are highly motivated to address a major science challenge in thin film physics.
  • You are fluent in English and have obtained relevant, evidenced research results.

Salary Benefits:

You will be appointed on a fulltime position for two years, with possible extension, within a very stimulating scientific environment. The university offers a dynamic ecosystem with enthusiastic colleagues. The starting salary ranges from € 3255,-- to € 4274,--. gross per month depending on experience and qualifications in accordance with the Collective Labour Agreement (CAO) of the Dutch Universities. The offer further involves: a holiday allowance of 8% of the gross annual salary and a year-end bonus of 8.3%, a solid pension scheme, professional and personal development programs.


The start of the project is as soon as possible. Applications should include an application/motivation letter, emphasizing your specific interest and motivation, a detailed CV (resume), a publication list, contact details of referees, and an academic transcript of B.Sc. and M.Sc. education. An interview and a scientific presentation will be part of the selection procedure. For more information about the position, you can contact Prof. Fred Bijkerk at, +31620573555, +31534892863 or Dr. Robbert van de Kruijs at, +31 534894415, +31 616422790.

Work Hours:

38 hours per week


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