2012.12.19-21 A-COE 2012/High-Performance Bottom-Contact Organic Thin-film Transistor Using Copper Source and Drain Electrod（Yuya Utsuno, Tsubasa Sato, Takahiro Koshita, Shinya Oku, Makoto Mizukami, Kenjiro Fukuda, Daisuke Kumaki, Shizuo Tokito）