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YAMAGATA, July 1 Asia Pulse - Tohoku Pioneer Corp. (TSE:6827), working with a metals processor in Niigata Prefecture, has developed an ultrathin magnesium diaphragm for use in speakers.
Magnesium 0.2mm to 0.5mm thick has already been developed for use in such items as mobile phone parts, but the two firms have succeeded in producing magnesium 0.05mm thick -- the thinnest in the world. The cone-shaped tweeter diaphragm was made using a special pressure method to achieve thinness and special hot press technology to ...