Hsinchu, Taiwan, July 3, 2018 - United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) ("UMC"), a leading global semiconductor foundry, today announced that the Fuzhou Intermediate People's Court of the People's Republic of China (PRC) today issued a preliminary injunction against Micron Semiconductor (Xi'an) Co., Ltd. and Micron Semiconductor (Shanghai) Co., Ltd. enjoining Micron from offering to sell, and selling in the PRC 26 DRAM and NAND-related items, including certain solid-state hard drives (SSD) and memory sticks in China.

Jason Wang, co-president of UMC, stated, "UMC is pleased with today's decision. UMC invests heavily in its intellectual property and aggressively pursues any company that infringes UMC's patents."

UMC filed patent infringement lawsuits against Micron with the mainland China courts in January, 2018, covering three areas, including specific memory applications related to DDR4, SSD and memory used in graphics cards. With today's ruling, Micron's products now face injunction for violating UMC's patent rights in a court verdict that applies to all of mainland China.

UMC has devoted a great deal of resources and manpower to researching and developing semiconductor manufacturing technology. Its achievements can be applied to logic chips or memory chips (DRAM), and the company has been awarded patents by various countries. UMC continuously monitors these patents as market conditions evolve. When violations occur, UMC stands ready to pursue patent infringement litigation in order to obtain judgment and remedies to protect the intellectual property rights of the company.

UMC (NYSE: UMC, TWSE: 2303) is a leading global semiconductor foundry that provides advanced IC production for applications spanning every major sector of the electronics industry. UMC's comprehensive foundry solutions enable chip designers to leverage the company's sophisticated technology and manufacturing, which include world-class 28nm High-K/Metal Gate technology, 14nm FinFET volume production, specialty process platforms specifically developed for AI, 5G and IoT applications and the automotive industry's highest-rated AEC-Q100 Grade-0 manufacturing capabilities for the production of ICs found in vehicles. UMC's 11 wafer fabs are strategically located throughout Asia and are able to produce over 600,000 wafers per month. The company employs more than 20,000 people worldwide, with offices in Taiwan, China, Europe, Japan, Korea, Singapore, and the United States. UMC can be found on the web at http://www.umc.com.

Note from UMC Concerning Forward-Looking Statements

Some of the statements in the foregoing announcement are forward looking within the meaning of the U.S. Federal Securities laws, including statements about future outsourcing, wafer capacity, technologies, business relationships and market conditions. Investors are cautioned that actual events and results could differ materially from these statements as a result of a variety of factors, including conditions in the overall semiconductor market and economy; acceptance and demand for products from UMC; and technological and development risks. Further information regarding these and other risks is included in UMC's filings with the U.S. Securities and Exchange Commission, including its registration statements and reports on Forms F-1, F-3, F-6 and 20-F and 6-K, in each case as amended. UMC does not undertake any obligation to update any forward-looking statement as a result of new information, future events or otherwise, except as required under applicable law.