ORGANISATION/COMPANYGraz University of Technology, ISW
RESEARCH FIELDEngineering › Mechanical engineering
RESEARCHER PROFILEFirst Stage Researcher (R1)
APPLICATION DEADLINE30/11/2021 23:00 - Europe/Athens
LOCATIONAustria › Graz
TYPE OF CONTRACTTemporary
HOURS PER WEEK40
OFFER STARTING DATE01/11/2021
Reactive species transport inside nanometric structures
on wet-processed silicon wafers
The company Lam Research develops and manufactures single-wafer wet-processing devices for the
global semiconductor industry. The spin processing tools are designed for a highly controlled deposition of
specific cleaning, etching, and stripping chemicals on the rotating semiconductor wafers. The working liquid
is supplied through a vertical jet moving above the rotating wafer (see Figure 1). The ongoing miniaturization
of the surface structures makes it increasingly difficult to attain the desired quality of the process result.
For mastering this challenge, one needs a reliable comprehensive description of the relevant multi-scale
transport phenomena, ranging from the macro- and microscopic liquid film flow scales on the rotating substrate
down to smallest molecular scales inside the nanometer-size channel structures (vias, see Figure 2)
fabricated by the etching process. The present project shall develop a computational model for predicting
the convective/diffusive transport of reactive species on their way from the liquid film supply at the entrance
down to the bottom of the via, where these agents are supposed to chemically dissolve and remove all
residues from the prior etching. Starting from an already existing model for the macroscopic on-wafer
transport of mass, momentum and heat in the rotating thin film, the numerical modelling shall be extended
to the nanoscopic molecular diffusive transfer mechanisms inside the via, including chemical reactions.
Measured residue amounts from via-bottom reactions are used for model validation.
The project is carried out within the framework of the COMET centre of excellence “Centre for Electrochemistry
and Surface Technology (CEST)” Austria, with the industrial partner Lam Research AG, located at
Villach (Austria). The academic partner, the Institute of Fluid Mechanics and Heat Transfer at Graz University
of Technology, will supervise the candidate based on the scientific content of the project work.
Starting date: Any time from now, at the earliest convenience
Duration: 3 years
We are looking for and encourage applications from interested, ambitious,
and skilled students holding a Diploma or Master degree in Mechanical or Chemical Engineering,
Physics, or Scientific Computing. Experience in numerical flow simulation is of advantage. Graduation as
a PhD is possible.
EURAXESS offer ID: 689694
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