UMC is a 300mm manufacturing leader with several advanced 300mm fabs in operation. Fab 12A in Tainan, Taiwan has been in volume production for customer products since 2002 and is currently manufacturing products down to 14nm. The multi-phase complex is actually three separate fabs, consisting of Phases 1&2, 3&4, and 5&6. Fab 12A's total production capacity is currently over 75,000 wafers month. UMC's second 300mm fab, Fab 12i, is located in Singapore's Pasir Ris Wafer Park. This second-generation 300mm facility is also in volume production, with capacity at 50,000 wafers per month. United Semi in Xiamen, China, began volume production in Q4, 2016. The total design capacity of United Semi is 50,000 wafers per month when fully equipped. UMC also acquired USJC in Japan in October of 2019. This fab, based in Mie Prefecture, provides 33,000 wafers per month capacity for logic and specialty processes down to 40nm. UMC's geographically diversified 300mm manufacturing throughout Asia means customers can mitigate their manufacturing risk while still maintaining production within the same region to ensure seamless engineering support from UMC's Taiwan headquarters.
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