United Microelectronics Corp (UMC) is a semiconductor foundry company that provides advanced semiconductor manufacturing services. It mainly carries out the manufacturing of logic/mixed-signal, embedded non-volatile-memory, 3D FinFET, RF CMOS, Embedded Non-Volatile Memory, Embedded High Voltage, BCD (Bipolar-CMOS-DMOS), RF SOI (Radio Frequency Silicon on Insulator), GaAs (Gallium Arsenide), GaN (Gallium Nitride), and 2.5D/3D advanced packaging technology. UMC serves major sectors of the electronics industry, including communication devices, consumer electronics, computers, networking, telecommunications, internet, multimedia, PCs, and graphics.

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UMC's R&D team is focused on advancing logic process technology and meeting customer demands through pure-play wafer foundry solutions. The company has invested significantly in R&D leading to advancements in logic and specialty technologies. Key developments include the 14nm and 12nm FinFET process technologies, non-volatile memory processes, high voltage display driver IC processes, power management IC processes, ISP processes for CMOS image sensors, MEMS processes, RFSOI processes, compound semiconductors, 2.5D & 3DIC packaging technologies, and silicon photonics technologies. The R&D unit of UMC is responsible for promoting the development of logic process technology, expanding production facilities, recruiting and training R&D talent, and collaborating with partners like Intel and eMemory Technology to enhance technology node upgrades and capacity expansion. UMC has filed 671 patent applications in FY2025, with a total of over 16,700 patents accumulated. The company has major technology alliances with Intel, SST, eMemory Technology, and imec, among others, to advance its technology offerings. In FY2025, the company incurred expenses of TWD17,724.7million on R&D, which as a percentage of revenue, stood at 7.5%.