Dow Corning said its polysilicon sales, via its majority owned subsidiary Hemlock Semiconductor declined in first half of 2015.

"Dow Corning's first half results continued to be impacted by fewer polysilicon shipments to long-term contract customers,” said J. Donald Sheets, CFO. “These contracts have a degree of variability when customers take their product and recent order patterns have resulted in customer orders being concentrated late last year."

Dow Corning also noted its earnings had been impacted by the strong US dollar. Group sales were US$1.42 billion, down 8% from the previous year period. Net income was US$113 million.