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 arm focuses on the dynamics of the semiconductor industry and continues to invest in and develop semiconductor manufacturing process technology and know-how. The company focuses on optimizing transistor performance, reducing power consumption, and enhancing technical advantages. The company's research and development efforts are directed towards delivering comprehensive foundry solutions, which include key process technologies for logic and specialty manufacturing. The company aims to continue investing in technology innovation, optimizing capacity to enhance product mix, and penetrating emerging applications to expand market share. As of December 2024, it had added 364 patents to the portfolio, including 251 in the United States, 29 in Taiwan, 61 in China, and 23 in another countries, totaling it to 15,196. In FY2024, the company incurred expenses of TWD12,953 million on R&D, which as a percentage of revenue, stood at 4.6%.