Manchester, NH and Hsinchu, Taiwan, July 31, 2018 - Allegro MicroSystems (Allegro), a leader in developing high-performance power and sensing semiconductors, and United Microelectronics Corporation (NYSE: UMC; TWSE: 2303) ("UMC"), a leading global semiconductor foundry, have signed a long-term agreement for UMC to continue as Allegro's primary foundry wafer manufacturer.

The agreement covers technical collaboration and establishes capacity at UMC for Allegro's proprietary automotive-grade technologies, supporting the strong long-term growth projections of Allegro. The two companies established a previous agreement in 2012 that initiated the transfer and production of Allegro's own technologies to UMC's manufacturing facilities.

“We wanted a partnership that would help us expand Allegro's business and portfolio. UMC has been extremely successful in satisfying the technology, quality, and production needs of our customers,” said Thomas Teebagy, Senior Vice President of Operations and Quality. “UMC has the capacity and technology to accommodate Allegro's projected growth and increasing wafer shipment requirements.”

Allegro has previously ported its ABCD4 and ABCD6 processes to UMC and will continue to port its own processes under the newly signed agreement. Currently, the two companies are developing Allegro's A10S and A10P 0.18um BCD technologies as well as supporting custom, leading edge GMR / TMR on-silicon integration.

Bruce Lai, Vice President of 8" Operations at UMC said, “UMC's sustained effort towards developing robust specialty and automotive technologies has enabled us to become a foundry leader in automotive IC production, with AEC-Q100 qualified processes backed by manufacturing that complies with rigorous ISO TS-16949 automotive quality standards for all UMC fabs. We value our long-standing partnership with Allegro to produce their automotive ICs, and we are pleased to extend our cooperation through this new agreement to support their future growth requirements and help enhance their market position.”

Allegro MicroSystems, (Allegro) is a leader in developing high-performance power and sensing semiconductors. Allegro's innovative solutions serve high-growth applications within the automotive market, with additional focus on industrial and consumer/computing solutions. Allegro is headquartered in Manchester, New Hampshire (USA) with design, applications, and sales support centers located worldwide. For more information, please visit Allegro MicroSystems.

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 https://www.umc.com.