Yee-wen Yen is a full Professor of the National Taiwan University of Science and Technology, Department of Materials Science and Engineering. 05,07-09 Outstanding paper award by the Taiwan Printed Circuit Association (2005, 2007-2009), Best Student Paper Award of the 4th International Microsystems Packaging, Assembly and Circuits Technology Conference (2009), and Outstanding Youth Researcher Award from National Taiwan University of Science and Technology (2012). His research interests include phase equilibria and interfacial reactions between lead-free solders and various substrates, thermodynamics and kinetic to a variety of materials-Sn based alloys, electronic packaging, SOFC (Solid oxide fuel cell), chemical plating, nanotechnology, CALPHAD (Calculation of phase diagram-by using "Panda"), bulk metallic glass (BMG), and high entropy alloys (HEAs). He is author and co-author of 71 papers published in SCI International scientific journals (2005-2021), and more than 76 times attending international conferences.

I focus on the interfacial reactions, phase equilibria, inter-diffusion, surface morphologies, and reaction paths in view of thermodynamics and kinetics. The systems I study include leader-free solders and substrates or interconnect materials in solid-oxide-fuel-cell (SOFC), such as Sn-Ag-Cu, Sn-Zn-Ag, Sn-Cu-Au, or Fe-Cr-Ni, etc. Besides these research topics, I am also concerned with the phase equilibria among the material systems I mentioned above. I tried to establish the thermodynamics database of different material systems by experimental methods and calculations with Panda. I also try to develop a novel method to synthesize carbon nanotubes (CNTs). Due to my former work experience, I investigate the thermal stability between thin films in TFT-LCD, especially for a Cu metallization case. Meanwhile, I am also interested in CALPHAD (Calculation of Phase Diagram) method to predict the Bulk Metallic Glass (such as Zr-based and Cu-based systems) and High Entropy Alloys.