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  3. 3-year postdoc position: development of a rubidium Focused Ion Beam instrument

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3-year postdoc position: development of a rubidium Focused Ion Beam instrument

BackgroundFocused Ion Beam (FIB) instruments are important tools for the semiconductor industry. Essential applications are editing circuits and repairing …

8 maanden geleden


de Rondom, Eindhoven, Noord-Brabant
Tijdelijk contract / Tijdelijke opdracht
Uren per week:
38 uur


Focused Ion Beam (FIB) instruments are important tools for the semiconductor industry. Essential applications are editing circuits and repairing masks in the development phase, failure analysis during wafer processing, and preparing samples for inspection using transmission electron microscopy. As a result of the continuing reduction of feature sizes in semiconductor circuits, FIBs also face higher demands, in particular in terms of resolution and reduced damage. The Coherence and Quantum Technology research group has recently developed a unique rubidium ion beam that may overcome the limitations of existing FIBs. The essential innovation is the use of a new type of ion source that is based on photo-ionization of a laser-intensified and extremely cold atomic rubidium beam. To make this a viable next-generation instrument, it is equally necessary to demonstrate superior beam properties as well as to investigate suitability for essential applications.

Project description
In this project, the properties of the new instrument will be experimentally assessed and optimized with the eventual aim of creating a practically useful prototype instrument. Therefore the research will focus on attainable beam qualities, including 1 nm resolution in imaging and milling, achievable current, beam profile, energy range, stability, reliability and also user-friendliness. In addition, the interaction of rubidium ions with typical materials will be studied to investigate the essential suitability of a Rb+ FIB for real-world applications. To this end, sputter and deposition processes will be analyzed in terms of rates, staining, surface roughening, and other forms of damage. The research will be performed together with a PhD candidate. The project is jointly funded by the Netherlands Organization for Scientific Research and FEI Company (part of Thermo Fisher Scientific).

The work will be mostly performed in the Coherence and Quantum Technology group of the Department of Applied Physics on the campus of Eindhoven University of Technology. The research in the CQT group is centered on coherence in ensembles of atoms, ions, electrons and photons. We combine expertise from plasma physics, AMO physics and particle beam physics to investigate new areas and applications of these techniques, either to future technologies or to other areas in physics. Considerable time may also be spent at the facilities of ThermoFischer Scientifc/FEI Netherlands in Eindhoven where for instance part of the sample analysis and FIB training will take place. Work visits to TFS/FEI Corporate Headquarters in Hillsboro, USA can also be expected.

J.J. McClelland et al, Appl. Phys. Rev. 3, 011302 (2016)
G. ten Haaf et al, Phys. Rev. Applied 7, 054013 (2017)
G. ten Haaf et al, Phys. Rev. A 96, 053412 (2017)
G. ten Haaf et al, Ultramicroscopy 190, 12 (2018)


We are looking for talented and motivated candidates with a PhD degree in experimental Physics. A background in atomic and optical physics, charged particle beams/microscopy and/or materials science is highly desirable. Candidates must also have good communication skills, including fluency in written and spoken English. You must be able to work with a great deal of independence but also to collaborate in good team spirit with other members of the team. Important selection criteria is an advanced scientific background including experimental work at the level of major research universities.


We offer:
  • A challenging job in a stimulating internationally renowned research group;
  • full-time temporary appointment for initially 1 year, with outlook on appointment for
    3 years;
  • a gross salary of between € 3045.- and € 4166,- gross per month, depending on knowledge and experience (based on salary scale 10 of CAO Dutch Universities);
  • an extensive package of fringe benefits (e.g. excellent technical infrastructure, the possibility of child care and excellent sports facilities).
  • Additionele informatie

    Information on employment conditions can be found at www.tue.nl/en/university/working-at-tue/working-conditions/
  • For more information about the project, please contact dr.ir. E.J.D. Vredenbregt (e.j.d.vredenbregt@tue.nl) or dr.ir. P.H.A. Mutsaers (p.h.a.mutsaers@tue.nl)

  • Application
    You can apply by pressing the 'apply now' button for this vacancy.
    Applications should include:
  • a cover letter explaining your motivation and qualifications for the position,
  • a curriculum vitae,
  • a copy of (or link where to download) your PhD thesis,
  • a list of scientific publications that you have (co-)authored.

  • Screening of applications will start as soon as applications are received and will continue until the position has been filled.