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The influence of material properties on the wire sawing process of multicrystalline silicon

 
: Kaden, T.; Ershova, E.; Lottspeich, L.; Fuchs, M.

:
Fulltext urn:nbn:de:0011-n-4844278 (332 KByte PDF)
MD5 Fingerprint: fd3e971129ced6c11e88dd018573821a
Created on: 23.2.2018


Smets, A.:
33rd European Photovoltaic Solar Energy Conference and Exhibition, EU PVSEC 2017 : Proceedings of the international conference held in Amsterdam, The Netherlands, 25 September - 29 September 2017
München: WIP, 2017
ISBN: 978-3-936338-47-8
ISBN: 3-936338-47-7
pp.537-540
European Photovoltaic Solar Energy Conference and Exhibition (EU PVSEC) <33, 2017, Amsterdam>
English
Conference Paper, Electronic Publication
Fraunhofer ISE ()
Materialien - Solarzellen und Technologie; Photovoltaik; Silicium-Photovoltaik; feedstock; Kristallisation und Wafering; wafering; wire; silicon; characterization

Abstract
The influence of material properties on the cutting efficiency of multicrystalline silicon was investigated for bricks taken from different positions of industrial-scale G5 multicrystalline silicon ingots in a diamond wire sawing process. It is shown, that bricks from diverse ingot positions reveal significant differences regarding the forces in feed direction when exactly the same process conditions are applied. Higher forces in feed direction imply a stronger bowing of the wire web developing during the process and therefore indicate a lower cutting efficiency. The size of silicon nitride and silicon carbide precipitates in the material are identified as the main factor for the cutting efficiency. The findings show the potential to optimize industrial wafering processes regarding process time or wire consumption.

: http://publica.fraunhofer.de/documents/N-484427.html