Abstract
Processes are examined for fine purification of metallurgical-grade gallium recovered from various semiconductor waste materials based on GaAs and GaP. A classification is proposed for major Ga-containing waste materials. With allowance made for the behavior of impurities during the purification of metallurgical-grade gallium by different techniques, a multistep process is devised for preparing high-purity (99.9999%) gallium. The products of this process compare well with materials produced from conventional starting reagents and are suitable for the preparation of high-quality compound semiconductors.
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Kozlov, S.A., Potolokov, N.A., Fedorov, V.A. et al. Preparation of High-Purity Gallium from Semiconductor Fabrication Waste. Inorganic Materials 39, 1257–1266 (2003). https://doi.org/10.1023/B:INMA.0000008910.85474.cb
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DOI: https://doi.org/10.1023/B:INMA.0000008910.85474.cb