Japan's Tokuyama Corporation Announces Large-scale Polysilicon Construction Plan

Japan’s Tokuyama Corporation announced on October 16, 2010 that it will build a world-scale large-scale polysilicon complex in Malaysia. The plan will be invested in five phases. The second phase will double the scale. The company has completed a feasibility study of the project, which will be built in Samalaju Industrial Park, northeast of Bintulu, Sarawak Province. The device invests approximately 65 billion yen (US$769.7 million).
The first phase of the project involved the construction of a 6,000-ton/year polysilicon plant and the use of Deshan Vapor-to-Liquid Deposition (VLD) technology, which has been developed on a medium-sized Shunan plant in Japan and expanded to a verification facility. The VLD technology uses trichlorosilane as a raw material and involves the direct deposition of liquid silicon from a gas in a tubular reactor, and its deposition rate is much faster than existing production methods. Confirmation tests using VLD technology show that the photoelectric conversion efficiency of VLD silicon solar cells is the same as that of solar cells manufactured from semiconductor silicon. The construction of the joint facility is expected to begin in 2011 and be completed in 2013. Deshan's 8,200-ton/year polysilicon plant in Shunan uses conventional technology and is already in production. The second phase of the Malaysian project involved more than doubling the capacity of polysilicon, but the time will depend on the global polysilicon market.

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