3-year Postdoc Position Development of A Rubidium Focused Ion Beam Instrument

A new postdoctoral associate position in semiconductors is available at Eindhoven University of Technology. Applications will be evaluated on a continuous basis.


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). Location

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. Literature

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.


Information on employment conditions can be found at Application

You can apply by pressing the 'apply now' button for this vacancy. Applications should include: Screening of applications will start as soon as applications are received and will continue until the position has been filled.


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