Professor Yu’s research has centred on solid-state electronic devices and silicon technologies underlying modern integrated circuits. During nearly four decades at IBM Research, he led the Silicon Technology Department and contributed to the development and scaling of semiconductor device technologies, while also participating in corporate research strategy and technology planning. His professional service subsequently extended to the development of semiconductor and high-technology industries in East Asia. From 1983 to 1992, he served on the Technology Review Board of the Science and Technology Advisory Group of Taiwan’s Executive Yuan, including as Executive Secretary, and he was a Director of the Institute for Information Industry. He also served on the Guidance Committee of the Ministry of Economic Affairs’ Submicron Project, advising on the development of integrated-circuit programmes. From 1977, he served on the Americas Technical Advisory Committee of the Industrial Technology Research Institute and later chaired it; he subsequently served as Chairman of its Frontier Technology Guidance Committee from 1994 to 2003 and as Honorary Chairman. Through sustained industrial research, technology advisory work, and international scientific exchange, Professor Yu has contributed to the development of semiconductor technology and to the growth of electronics industries across China, Taiwan, and the United States.