In automotive power electronics packages (e.g., insulated gate bipolar transistor [IGBT] packages), conventional polymeric thermal interface materials (TIMs) such as greases, gels, and phase-change materials pose a bottleneck to heat removal and are also associated with reliability concerns. High thermal performance bonded interfaces have become an industry trend. However, due to mismatches in the coefficient of thermal expansion between materials/layers and the resultant thermomechanical stresses, there could be voids and crack formations in these bonded interfaces as well as delaminations, which pose a problem from a reliability standpoint. These defects manifest themselves in increased thermal resistance in the package, which acts as a bottleneck to heat removal from the package. Hence, the objective of this research is to investigate and improve the thermal performance and reliability of novel bonded interface materials for power electronics packaging applications. Thermal performance and reliability of bonds/joints is presented for bonds based on a thermoplastic (polyamide) adhesive with embedded micron-sized carbon fibers, sintered silver (Ag), and conventional lead (Pb)-based solder materials. These materials form a bond between 50.8 mm × 50.8 mm footprint direct-bond-copper (DBC) substrate and copper (Cu) base plate samples. Samples undergo thermal cycling (−40°C to 150°C) for up to 2,000 cycles as an upper limit. Damage occurrence is monitored every 100 temperature cycles by several non-destructive techniques, including steady-state thermal resistance measurement, acoustic microscopy, and high-voltage potential testing. This yields a consistent story on the thermal performance and reliability of large-area joints under accelerated stress conditions.
Skip Nav Destination
ASME 2011 International Mechanical Engineering Congress and Exposition
November 11–17, 2011
Denver, Colorado, USA
Conference Sponsors:
- ASME
ISBN:
978-0-7918-5497-6
PROCEEDINGS PAPER
Thermal Performance and Reliability of Large-Area Bonded Interfaces in Power Electronics Packages
Sreekant Narumanchi,
Sreekant Narumanchi
National Renewable Energy Laboratory, Golden, CO
Search for other works by this author on:
Douglas DeVoto,
Douglas DeVoto
National Renewable Energy Laboratory, Golden, CO
Search for other works by this author on:
Mark Mihalic,
Mark Mihalic
National Renewable Energy Laboratory, Golden, CO
Search for other works by this author on:
Tim Popp,
Tim Popp
National Renewable Energy Laboratory, Golden, CO
Search for other works by this author on:
Patrick McCluskey
Patrick McCluskey
National Renewable Energy Laboratory, Golden, CO
Search for other works by this author on:
Sreekant Narumanchi
National Renewable Energy Laboratory, Golden, CO
Douglas DeVoto
National Renewable Energy Laboratory, Golden, CO
Mark Mihalic
National Renewable Energy Laboratory, Golden, CO
Tim Popp
National Renewable Energy Laboratory, Golden, CO
Patrick McCluskey
National Renewable Energy Laboratory, Golden, CO
Paper No:
IMECE2011-65399, pp. 837-842; 6 pages
Published Online:
August 1, 2012
Citation
Narumanchi, S, DeVoto, D, Mihalic, M, Popp, T, & McCluskey, P. "Thermal Performance and Reliability of Large-Area Bonded Interfaces in Power Electronics Packages." Proceedings of the ASME 2011 International Mechanical Engineering Congress and Exposition. Volume 11: Nano and Micro Materials, Devices and Systems; Microsystems Integration. Denver, Colorado, USA. November 11–17, 2011. pp. 837-842. ASME. https://doi.org/10.1115/IMECE2011-65399
Download citation file:
24
Views
Related Proceedings Papers
Related Articles
Impact Resistance of SM Joints Formed With ICA
J. Electron. Packag (March,2003)
Impact Resistance of SM Joints Formed With ICA
J. Electron. Packag (December,2002)
Direct Silver to Copper Bonding Process
J. Electron. Packag (December,2008)
Related Chapters
Reliability of Electronic Packaging
Essentials of Electronic Packaging: A Multidisciplinary Approach
Microstructure Evolution and Physics-Based Modeling
Ultrasonic Welding of Lithium-Ion Batteries
Structural Performance of Thermo-Active Foundations
Thermoactive Foundations for Sustainable Buildings