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Comparative investigations of the surface damage of monocrystalline silicon wafers by scanning infrared reflection examination and raman spectroscopy

 
: Möller, H.J.; Würzner, S.; Buchwald, R.; Herms, M.; Wagner, M.

:

Pichler, Peter (Hrsg.):
Gettering and defect engineering in semiconductor technology XVI : Selected, peer reviewed papers from the GADEST 2015: Gettering and Defect Engineering in Semiconductor Technology, September 20-25, 2015, Bad Staffelstein, Germany
Dürnten: Trans Tech Publications, 2016 (Diffusion and defect data. B, Solid state phenomena 242)
ISBN: 978-3-03835-608-0
ISBN: 978-3-0357-0083-1
DOI: 10.4028/www.scientific.net/SSP.242
pp.466-471
International Conference on Gettering and Defect Engineering in Semiconductor Technology (GADEST) <16, 2015, Bad Staffelstein>
English
Conference Paper
Fraunhofer ISE ()

Abstract
Mechanical preparation of mono- and multicrystalline silicon wafers by sawing, lapping, or grinding damages the surface. Depending on the mechanical impact of the treatment different degrees of damage structures occur. It is necessary for further processing of wafers to have damage free and contactless methods to characterize structures such as changes of the lattice structure by phase transformations or plastic deformations, and microcracks below the surface. In this paper we present results of investigations on the sub-surface damage by two contactless optical methods: Scanning infrared reflection polarimetry with SIREX and Raman spectroscopy. The investigations were carried out on silicon wafers sawn with the multi-wire technique using diamond coated wires. The sub-surface damage mainly consists of microcracks of different length, which penetrate several micrometers into the bulk.

: http://publica.fraunhofer.de/documents/N-422514.html