[Description 99.1 Announcement on 2011/03/21: To announce related materials on acquisition of machinery and equipment 99.2 Announcement on 2011/03/08: February Revenue 99.3 Announcement on 2011/03/15: the trading and pledge of UMC common shares by directors, executive officers and 10% shareholders of UMC 1 To announce related materials on acquisition of machinery and equipment 1. Name and nature of the subject] [FORM 6-K March 28, 2011 United Microelectronics Corporation ——————————————————————————————————— No. 3 Li Hsin Road II ——————————————————————————————————— x x n/a United Microelectronics Corporation Chitung Liu Chitung Liu Chief Financial Officer Description 99 6K on 20110328 6-K 1 htm_5705.htm LIVE FILING]