Flexible Epoxy and Sintered Silver Micro-fillers Advance Low-Temperature Sintering and Reliability in WBG Semiconductor Packaging

June 28, 2026

ResearchGate Global

Overview

A new study reports that die-attach materials combining flexible epoxy binders with sintered silver (s-Ag) micro-fillers accelerate low-temperature sintering and significantly enhance interconnection properties and reliability in wide bandgap (WBG) semiconductor packaging. The research evaluates s-Ag material properties, tensile mechanical characteristics, and reliability under high-temperature storage, power cycling, and thermal shock tests, providing effective design parameters. This innovation maximizes the low energy loss and high-temperature operating capabilities of WBG devices, driving semiconductor industry advancements.

In Depth

Flexible Epoxy and Sintered Silver Micro-fillers Revolutionize Low-Temperature Sintering and Reliability in WBG Semiconductor Packaging

Groundbreaking research in wide bandgap (WBG) semiconductor packaging has unveiled a novel die-attach material that utilizes a flexible epoxy as a binder in conjunction with sintered silver (s-Ag) micro-fillers. This innovative approach accelerates the sintering process at lower temperatures while significantly enhancing both interconnection properties and overall reliability. This method offers a distinct advantage over traditional high-temperature sintering, reducing energy consumption and enabling applicability to a wider range of substrate materials.

Technical Details and Evaluation Methodology

The study provides a detailed review of the fundamental properties of s-Ag materials and their tensile mechanical characteristics. Crucially, it elucidates the mechanism by which the introduction of flexible epoxy alleviates internal stresses within the sintered silver layer, thereby improving its resistance to external mechanical stresses. For reliability assessment, rigorous stress tests including High-Temperature Storage, Power Cycling, and Thermal Shock Tests were employed. These tests validated the long-term stability and robustness of the s-Ag die-attach, providing effective design parameters to ensure the reliability of WBG devices under harsh operating conditions.

Impact on WBG Semiconductor Devices and Future Prospects

WBG semiconductor devices, such as SiC and GaN power devices, offer significant advantages over traditional silicon-based devices in terms of lower energy loss, higher switching frequencies, and enhanced high-temperature operation capabilities. However, realizing their full potential necessitates thermally and mechanically robust packaging. The low-temperature sintered s-Ag die-attach material with flexible epoxy, as demonstrated in this research, represents a pivotal technology for addressing these challenges in WBG devices. This technology is expected to accelerate the adoption of WBG devices in a wide range of applications, including more compact and efficient power electronics, EVs, and renewable energy systems. This advancement in semiconductor packaging technology is poised to play a crucial role in enhancing the performance and sustainability of next-generation electronics.

Source: https://www.researchgate.net/publication/403069969_Binder_Chemistry_with_Flexible_Epoxy_for_Accelerated_Low-Temperature_Sintering_of_Silver_Micro-fillers_and_Enhanced_Interconnection_Properties

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