Research Topics

SIRI Lab

Advanced Packaging Materials

As the semiconductor industry advances beyond the age of simple scaling, it becomes imperative to go beyond device engineering and analyze new materials. While new materials are revolutionizing all aspects of the industry from superconductors to new transistor channels, the oft-neglected ultra-important category of advanced packaging materials is essential to efficient device function. More now than ever, interconnections need to be reliable under high temperatures and electrical stress. Therefore, SIRI lab works on investigating and improving various state-of-the-art interconnection technologies such as silver sintering paste, heavy wire bonding, nanotwinned material, and thermal interface materials. Additionally, SIRI lab uses EBSD characterization for identifying and improving these interconnections.

Silver Sintering Paste

Purpose: Use silver sintering to replace conventional soldering to in high power devices as it can operate at higher junction temperature conditions.

Heavy Wire Bonding (300-700 μm)

Purpose: For power electronics, the dimension of the wire must increase to withstand higher currents.

Nanotwinned Material

Purpose: An innovative solution for backside metallization material to improve bondability.

Thermal Interface Material

Purpose: Study on low melting alloy (LMA) as thermal interface material (TIM) for power modules.

EBSD

Purpose: Electron Backscatter analysis on ultra-fine Ag-alloy wire, to intepret the stage manner of electromigration mechanism.

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