The Next Generation of Si-Interposers

Himanandhan Reddy Kottur, Nitin Varshney, M Shafkat M Khan, Navid Asadizanjani
University of Florida
FL, USA

Charles G. Woychik, Ph.D
NHanced Semiconductors, Inc.

Silicon interposers with Through-Silicon Vias (TSVs) have become essential in advanced semiconductor packaging, enabling high-density integration, improved electrical performance, and efficient thermal management. This paper explores the next generation of silicon interposers, focusing on the technical advantages of using thicker interposers[1] with larger TSVs, specifically 50μm in diameter and 300μm in length.

These larger TSVs offer several benefits, including enhanced electrical interconnectivity, increased bandwidth, improved mechanical stability, and superior thermal dissipation, which are critical for applications such as high-performance computing (HPC), [2] artificial intelligence (AI), 5G infrastructure, and automotive electronics. We discuss the design considerations, material choices, and manufacturing challenges associated with this technology compared to traditional designs. The findings highlight the potential of this technology to drive future innovations in semiconductor packaging and system integration, making it a key enabler for next-generation electronic devices.

As semiconductor technology continues to evolve, silicon interposers are expected to play a growing role in addressing the interconnect bottleneck created by the need for increased bandwidth, performance, and power efficiency. Emerging techniques, such as advanced materials for TSVs, optimized thermal solutions, and low-cost fabrication processes, are expected to enhance the scalability and adoption of silicon interposers, ensuring that Moore's Law can continue its trajectory, not through transistor scaling alone, but through smarter and more efficient packaging solutions.