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Title: Mechanical Characterization Study of Sintered Silver Pastes: Preprint

Abstract

Sintered silver-based bonded interfaces are a critical enabling technology for high-temperature, compact, high-performance, and reliable wide-bandgap packages and components. High-pressure (about 40 MPa) sintered silver interfaces have been implemented commercially, most notably the commercial products offered by Semikron. To reduce manufacturing complexity, there is significant industry interest in pressure-less sintered silver interfaces. To this end, current formulations of sintered silver paste are comprised of purely nano-sized silver particles or a combination of nano- and micro-sized silver particles/flakes. It is essential to quantify the mechanical properties and determine the reliability of these interfaces prior to use in automotive power electronics applications. In this paper, research efforts at the National Renewable Energy Laboratory, in collaboration with Virginia Polytechnic Institute and State University and an industry partner, in optimizing the synthesis procedure and mechanical characterization of sintered silver double-lap samples are described. These double-lap samples were synthesized using pressure-less sintering techniques. Shear testing was conducted at multiple temperatures and displacement rates on these samples sintered using two types of sintered silver pastes, one of them consisting of nano-silver particles and the other a hybrid paste or a combination of nano- and micron-sized silver flakes, employed in a double-lap configuration. Maximum values of shearmore » stress obtained from the characterization study are reported.« less

Authors:
 [1];  [1];  [1]; ORCiD logo [1];  [2];  [2]
  1. National Renewable Energy Laboratory (NREL), Golden, CO (United States)
  2. Virginia Tech
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Vehicle Technologies Office (EE-3V)
OSTI Identifier:
1479629
Report Number(s):
NREL/CP-5400-71381
DOE Contract Number:  
AC36-08GO28308
Resource Type:
Conference
Resource Relation:
Conference: Presented at American Society of Mechanical Engineers (ASME) 2018 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems (InterPACK 2018), 27-30 August 2018, San Francisco, California
Country of Publication:
United States
Language:
English
Subject:
33 ADVANCED PROPULSION SYSTEMS; sintered silver; reliability; mechanical characterization; power electronics; bonded interfaces

Citation Formats

Paret, Paul P, Major, Joshua, DeVoto, Douglas J, Narumanchi, Sreekant V, Tan, Yansong, and Lu, Guo-Quan. Mechanical Characterization Study of Sintered Silver Pastes: Preprint. United States: N. p., 2018. Web.
Paret, Paul P, Major, Joshua, DeVoto, Douglas J, Narumanchi, Sreekant V, Tan, Yansong, & Lu, Guo-Quan. Mechanical Characterization Study of Sintered Silver Pastes: Preprint. United States.
Paret, Paul P, Major, Joshua, DeVoto, Douglas J, Narumanchi, Sreekant V, Tan, Yansong, and Lu, Guo-Quan. Tue . "Mechanical Characterization Study of Sintered Silver Pastes: Preprint". United States. https://www.osti.gov/servlets/purl/1479629.
@article{osti_1479629,
title = {Mechanical Characterization Study of Sintered Silver Pastes: Preprint},
author = {Paret, Paul P and Major, Joshua and DeVoto, Douglas J and Narumanchi, Sreekant V and Tan, Yansong and Lu, Guo-Quan},
abstractNote = {Sintered silver-based bonded interfaces are a critical enabling technology for high-temperature, compact, high-performance, and reliable wide-bandgap packages and components. High-pressure (about 40 MPa) sintered silver interfaces have been implemented commercially, most notably the commercial products offered by Semikron. To reduce manufacturing complexity, there is significant industry interest in pressure-less sintered silver interfaces. To this end, current formulations of sintered silver paste are comprised of purely nano-sized silver particles or a combination of nano- and micro-sized silver particles/flakes. It is essential to quantify the mechanical properties and determine the reliability of these interfaces prior to use in automotive power electronics applications. In this paper, research efforts at the National Renewable Energy Laboratory, in collaboration with Virginia Polytechnic Institute and State University and an industry partner, in optimizing the synthesis procedure and mechanical characterization of sintered silver double-lap samples are described. These double-lap samples were synthesized using pressure-less sintering techniques. Shear testing was conducted at multiple temperatures and displacement rates on these samples sintered using two types of sintered silver pastes, one of them consisting of nano-silver particles and the other a hybrid paste or a combination of nano- and micron-sized silver flakes, employed in a double-lap configuration. Maximum values of shear stress obtained from the characterization study are reported.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {10}
}

Conference:
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