GT Solar (SOLR) has received a $23.4 million follow-on order from South Korea-based polysilicon producer OCI Company, Ltd. for its newest SDR(TM) 400 CVD reactors and other equipment to support OCI’s polysilicon plant expansion. The SDR 400 are the most energy efficient reactors in the industry.

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“We are pleased by the confidence OCI has demonstrated with our polysilicon production technology,” said Tom Gutierrez, GT Solar’s president and CEO. “The additional throughput and cost savings of the SDR 400 CVD reactor allows OCI to further enhance their cost competitiveness.”

Shares of SOLR are off about 1% in early trading and probably needs to digest recent gains a bit.