Feb 1978Company establishment
May 1979Started manufacturing and sales of semiconductor manufacturing equipment
Jun 1983Head office relocation
Oct 1984Sendai factory establishment (Mono crystal silicon ingot/wafer)
※Integrated to group company in 2011
May 1990Kawaguchi factory establishment(semiconductor manufacturing equipment)
※Withdraw from business in 2011
Apr 2004Kochi factory establishment(Mono crystal silicon ingot)
Apr 20071st Soma factory establishment(Polysilicon)
Jan 2009Kochi 2md factory establishment(Mono crystal silicon ingot)
Jun 2009Capital alliance with AU Optronics Corp.
Aug 2010Soma 2nd factory establishment(Polysilicon)
※Withdraw from business in 2017
May 2014Head office relocation(Shiba, Minato-ku, Tokyo)