Indium Corporation Expert Dr. HongWen Zhang to Present at ICEP

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Indium Corporation’s Alloy Group R&D Manager Dr. HongWen Zhang will present on a high-temperature lead-free solder paste at the International Conference on Electronics Packaging (ICEP), supported by the International Microelectronics Assembly and Packaging Society (IMAPS), May 11-14 in Hokkaido, Japan. 

The harmful effects of lead on human health and the environment are driving the development of high-temperature lead-free (HTLF) solders to replace high-lead solders for die-attachment and clip-bond in power device applications. In his presentation, A Drop-In High-Temperature Pb-Free Solder Paste Outperforms High-Pb Pastes in Power Discrete Applications, Dr. Zhang examines a new formulation of Indium Corporation’s innovative material Durafuse™—a novel design based on a mixed-alloy technology—designed to deliver an Sn-rich HTLF paste, presenting the merits of both constituent alloys. This product, Durafuse™ HT, has shown the feasibility as a drop-in solution to replace high-Pb solders for die-attach in power discrete applications by delivering improved performance.

Dr. Zhang is manager of the alloy group in Indium Corporation’s R&D department. His focus is on the development of Pb-free solder materials and the associated technologies for high-temperature and high-reliability applications. He was instrumental in inventing the mixed-alloy solder technique to combine the merits of constituents to improve wetting, reduce processing temperatures, modify the bonding surface, and control the joint’s morphology, thus improving reliability.

Dr. Zhang has a bachelor’s degree in metallurgical physical chemistry from Central South University of China, a master’s degree in materials and engineering from the Institute of Metal Research, Chinese Academy of Science, and a master’s degree in mechanical engineering and a Ph.D. in material science and engineering from the Michigan Technological University. He has a Six Sigma Green Belt from the Thayer School of Engineering at Dartmouth College, and is a certified IPC Specialist for IPC-A-600 and IPC-A-610 as well as a certified SMT Process Engineer. He has extensive experience in various aluminum (Al) alloys and fiber/particle reinforced Al-based composite materials, and Al-rich and ZrHf-based amorphous alloys. He has co-authored two book chapters on high-temperature lead-free bonding materials, has had a number of patents filed, and has been published in approximately 20 journals in the fields of metallurgy, materials science and engineering, physics, electronics materials, and mechanics.

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