Quantitative microstructure characterization of Ag nanoparticle sintered joints for power die attachment
Wang, Yun and Li, Jianfeng and Agyakwa, Pearl and Johnson, Christopher Mark and Li, Shuguang (2014) Quantitative microstructure characterization of Ag nanoparticle sintered joints for power die attachment. Molecular Crystals and Liquid Crystals, 604 (1). pp. 11-26. ISSN 1542-1406
The samples of sintered Ag joints for power die attachments were prepared using paste of Ag nanoparticles at 240 °C and 5 MPa for 3 to 17 minutes. Their microstructural features were quantitatively characterized with scanning elec-tronic microscopy, transmission electron microscopy, X-ray diffraction and image analysis method. The resulting nor-malized thickness, pore size and porosity decreased, and grain size increased with increasing the sintering time. A time dependence of the form t1/n with n close to 2 or 3 can be further derived for the kinetics of the thinning, densification and grain growth within the sintered Ag joints.
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