The Evolution of Lead-free Solder Alloys

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(35:15 + Q&A) - Dr. HongWen Zhang, Indium Corporation - The practice of soldering has been around for thousands of years, but recent advances in soldering materials provide industrial users with more options than ever: low-temperature, middle-temperature, high-reliability solder for automotive applications, and Pb-free high-temperature solder. Dr. Zhang discusses why a customer might choose a specific solder product, what potential processing defects exist, and anticipated drop shock performance, reliability, and challenges. He and Dr. Ning-Cheng Lee invented the mixed powder solder technique to combine the merits of constituents to improve wetting, reduce processing temperatures, modify the bonding interface, and control the joint’s morphology, thus improving the reliability. On the basis of this technique, the BiAgX solder system was invented as an alternative high-temperature lead-free solder.

Dr. HongWen Zhang is the Manager of the Alloy Group at the Indium Corporation's Research & Development Department. His focus is on the development of lead-free solder materials and the associated technologies for high temperature and high-reliability applications. He and Dr. Ning-Cheng Lee invented the mixed powder technique to combine the merits of constituents to improve wetting, reduce processing temperatures, modify the bonding interface, and control the joint's morphology, thus improving the reliability.
Dr. Zhang has a bachelor’s degree in metallurgical physical chemistry from Central South University of China, a master’s degree in materials science and engineering from the Institute of Metal Research, Chinese Academy of Science, a master’s degree in mechanical engineering, and a Ph.D. in materials science and engineering from Michigan Technological University.

This talk was presented to the Malasia Chapter of the IEEE's Electronics Packaging Society.

(35:15 + Q&A) - Dr. HongWen Zhang, Indium Corporation - The practice of soldering has been around for thousands of years, but recent advances in soldering materials provide industrial users with more options than ever: low-temperature, middle-temperature, high-reliability solder for automotive applications, and Pb-free high-temperature solder. Dr. Zhang discusses why a customer might choose a specific solder product, what potential processing defects exist, and ...

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