JX Nippon Mining & Metals Corporation developed 4 micron thick of rolled copper foil, the thinnest level. 6 micron thick of foil has come into request from last year, because copper foil, which is used to electrical power collector for lithium-ion battery, is made thinner. The firm thinks to make the quality of 6 micron thick of foil dependable consolidating manufacturing technology for thinner foil.
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