Jun. 15, 2009 UMC Announces Retirement of Mr. Tony Yu as President of UMC-USA Office   Apr. 29, 2009 UMC Board of Directors Important Announcement   Apr. 29, 2009 UMC 1Q 2009 Financial Results > Teleconference    Live Webcast and Replay   Apr. 27, 2009 UMC, Springsoft Support Custom Chip Design with 65nm Process Design Kit