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• 23:13, 22 March 2026 Marcin talk contribs created page UMG-Si (Created page with "= Upgraded Metallurgical-Grade Silicon (UMG-Si) Process = UMG-Si is a lower-cost route for producing photovoltaic silicon by refining metallurgical-grade silicon (MG-Si) primarily through ''metallurgical'' methods rather than the full chlorosilane-based Siemens process. The goal is to remove impurities sufficiently for solar cell use, typically reaching a purity range on the order of 5N to 6N depending on process quality, feedstock control, and intended cell architectur...")