Head of Press and Information Office
Dr. Dr. Jens Simon
Phone: +49 531 592-3005
Email:
jens.simon(at)ptb.de
A new algorithm allows the fast reconstruction of atom distributions in 3D nanostructured surfaces
Over the last years, PTB has developed a new method for atom-specific reconstruction of periodically nanostructured surfaces. Recent studies have shown experimentally that it is possible to reconstruct and identify the spatial distribution of different atomic species in nano-components using X-ray fluorescence radiation. These techniques could become a powerful tool in the development and manufacture of nanostructures. A new mathematical model for the simulation of X-ray fluorescence intensity at grazing incidence of periodic 3D nanopattern structures was developed in the working groups 7.14 (EUV-Nanometrology), 7.24 (X-ray Spectrometry) and 8.41 (Modelling and Simulation) in collaboration with the University of Twente and the Kurchatov Institute. The new algorithm can be applied in general for light-matter interactions of layered systems and nanostructures. It is more than one magnitude faster than conventional FEM solutions with similar precision and accuracy. The development of the simulation algorithm is a considerable step towards the application of high precision real-time measurements that are suitable for inline metrology needed for the control of flexible manufacturing processes. Moreover, the significant speed up of computations enables the determination of reliable uncertainties based on Bayesian approaches which opens the possibility for the development of hybrid metrology techniques to improve PTB’s measurement capabilities even further.
Contact:
S. Heidenreich, 8.41, E-Mail: Sebastian.Heidenreich(at)ptb.de
V. Soltwisch, 7.14, E-Mail: Victor.Soltwisch(at)ptb.de
P. Hönicke , 7.24, E-Mail: Philipp.Hoenicke(at)ptb.de
Dr. Dr. Jens Simon
Phone: +49 531 592-3005
Email:
jens.simon(at)ptb.de
Karin Conring
Phone: +49 531 592-3006
Fax: +49 531 592-3008
Email:
karin.conring(at)ptb.de
Physikalisch-Technische Bundesanstalt
Bundesallee 100
38116 Braunschweig