Speaker: Xue Feng, Tsinghua University

Time: 20:00-21:30 pm, April 14, 2023, GMT+8

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Abstract:

Flexible electronics technology refers to the integration of different materials and functional units on flexible substrates to form thin, flexible, deformable and reconfigurable electronic devices/systems. It subversively changes the rigid physical form of traditional electronic devices. The core of flexible electronics technology is the design, manufacture and reliability of flexible integrated devices.

This talk firstly introduces the design theory and manufacture of flexible integrated devices, including the evolution mechanism of semiconductor properties under deformation and the integration method of transfer printing on heterogeneous interfaces. For wafer level manufacturing of flexible integrated devices, nanometer diamond enhanced wafer grinding method is used, which can thin 4-12 inch wafer to 25 microns. With ultra-thin chips transfer and high energy laser beam slicing, the single flexible chips with independent function are obtained.

Then the flexible chips are picked up, transferred, interconnected, encapsulated and integrated, and finally the flexible integrated devices are formed. The first small test line of flexible integrated device manufacturing domestic and abroad and the CNAS standard testing and certification system have been established, and ultra-thin flexible chips, high-density packaging of flexible chips, high-precision SMT of flexible circuit boards and low-temperature silicone injection encapsulation have been realized from chip level to module level manufacturing. The above technologies greatly promote the innovation and development of flexible integrated devices and their applications in health care, intelligent perception, major equipment and other fields.

Biography:

Xue Feng, male, born in 1977, Professor of Tsinghua University, 973 Project Chief Scientist, currently director of Flexible Electronic Technology Laboratory of Tsinghua University, President of Zhejiang Tsinghua Flexible Electronic Technology Research Institute, etc.

Professor Feng Xue is committed to solid mechanics and flexible electronics technology. So far, he has published more than 260 SCI papers in Nat. Mater., Sci. Adv., Adv Mater. More than 190 national invention patents and 9 software Copyrights were authorized. He has won the Heliang Heli Foundation Science and Technology Innovation Award, China Youth Science and Technology Award, National Outstanding Scientist of Science and Technology, Qiushi Outstanding Youth Award of China Association for Science and Technology, etc. Ranked in 1st, he has won the first prize of Beijing Natural Science, the first prize of Technology Invention of the Ministry of Education and many other awards.

Source: iCANX