Aunsborg, Thore

Aunsborg, Thore

Industrial PhD Topsil GlobalWafers A/S

PROJECT TITLE: Solid State Generator for Float Zone Process

PhD period: 2018.01.01 - 2020.12.31. (has been prolonged till 2021.03.31)
Section: Power Electronic Systems
Research Programme: Efficient and Reliable Power Electronics
Supervisor: Stig Munk-Nielsen
Co-Supervisors: Christian Uhrenfeldt and Christian Hindrichsen, Topsil GlobalWafers A/S
Contact information

Collaborator: Topsil GlobalWafers A/S.
Funding: Innovation Fund Denmark.


The float zone (FZ) crystal growth technique is utilized for the production of ultra-pure silicon, which is used primarily for power electronic components and high efficiency photovoltaics in the energy sector. The FZ technique utilizes high frequency and high power inductive heating, an area where vacuum-tube based RF generators are currently dominant on the market.

This project aims to investigate the opportunity to replace the low-efficiency vacuum-tube RF generators with solid-state RF generators. These will improve the energy efficiency of the FZ process, provide increased performance stability, and allow for better process control.


Publications in journals and conference papers may be found at VBN.