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They melt the high-purity silicon in high-purity quartz crucibles to ensure a single crystal in the resulting product; https://www.mmtc.co.jp/en/products/quart
by mikeyouse 2y ago
They melt the high-purity silicon in high-purity quartz crucibles to ensure a single crystal in the resulting product;
https://www.mmtc.co.jp/en/products/quartz.html https://www.mmtc.co.jp/en/products/quartz.html
"Semiconductor devices, the foundation of the semiconductor industry, are manufactured by creating a fine electronic circuit on a silicon wafer made of single-crystal silicon.
Single-crystal silicon is made from high-purity polycrystalline silicon (polysilicon) and is grown by filling a quartz crucible with the silicon before heating and melting it in the extracting machine.
A high-purity quartz crucible is the optimal container to ensure the purity of molten silicon when manufacturing single-crystal silicon."
- gosub100 2y agoI knew it was absolutely crucial for semiconductors, I just saw "non-proliferation" and thought there was some obscure usage for silicon specifically for nukes. Mere semiconductor use is an odd thing for anti-nuke protestors to single out. computers are essentially a commodity at this point, why not protest copper mines because copper wire is used in circuits?
- mikeyouse 2y agoAh, I missed the 'plutonium' at the end of your comment. Not from the area, but I suspect the protests there are more due to the HEU production site 20 miles away although I know the original plutonium manufacturing method resulted in a small 'button' of plutonium that was left in the bottom of a high-temp crucible after the final reduction step, so maybe this facility was instrumental in those crucibles?