So waaay back before 2008, Sony had control of a chip plant in Nagasaki, a semiconductor plant to be more precise, a plant which that year they sold to Toshiba Corp. Sony now plans to buy BACK that plant from Toshiba so that it might strengthen it's complementary metal-oxide semiconductor (CMOS) sensor business. All of this has been reported by the Nikkei business daily newspaper.
This acquisition will cost around 50 billion yen ($597.2 million USD) and will double Sony's image sensor output capacity. This will make Sony's output equivalent to about 40,000 silicon wafers a month. Nikkei mentions that with this move, Sony both boosts their output and lowers their production costs, putting them right up in the speedy lanes with Samsung and US groups in teh CMOS sensor market.