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Feb 14, 2022

UMC’s HeJian fab temporarily suspends production as employees test for COVID-19 infection

Hsinchu, Taiwan, February 14, 2022 - United Microelectronics Corporation (NYSE: UMC; TWSE: 2303)(“UMC”) today announced its 8-inch wafer fab subsidiary, HeJian Technology (Suzhou) Co., located in Suzhou, China, is temporarily halting its production after an employee is suspected of COVID-19 infection. A company-wide PCR test is being conducted. Once the PCR test is completed, HeJian Technology will resume its production as soon as possible with local authorities’ approval.


HeJian contributes approximately 5% to UMC’s consolidated revenues. UMC reiterates its first-quarter financial guidance will not be impacted by this event. The company’s first-quarter guidance is for average selling price to increase 5% quarter-on-quarter, gross profit margin to be approximately 40%, and shipment to remain flat. UMC’s market share will continue to grow in the global foundry market. This incident has no material impact on the company’s financial business.



UMC Corporate Communications

Michelle Yun

+886-2-2658-9168 ext. 16951