Silicom has created an Elmer-based tool, which demostrates the capabilities of the software to simulate heat transfer and thermal stress mechanisms during the vertical gradient-freeze (VGF) growth of GaAs crystals.

In Vertical Bridgman (VB)/Vertical Gradient Freeze (VGF) techniques, low thermal gradients can be used, which offers a way to grow GaAs crystals with low dislocation density.

In this work, we demonstrate the capabilities of Elmer software to simulate heat transfer and thermal stress mechanisms during the vertical gradient-freeze (VGF) growth of 3" GaAs crystals. The work is inspired by articles in the literature; Here we follow the article of J. Amon, P. Berwian, G. Müller, Journal of Crystal Growth 198/199 (1999). For further details of our work, see http://www.silicom.fi/files/documents/2016-07-15,%20vgf-gaas.pdf