naa a22 4500 510804888 CHVBK 20180411083412.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11664-012-2201-8 doi (NATIONALLICENCE)springer-10.1007/s11664-012-2201-8 Linkages Between Microstructure and Mechanical Properties of Ultrafine Interconnects [Elektronische Daten] [Zhiyong Wu, Zhiheng Huang, Hua Xiong, Paul Conway, Changqing Liu] Microstructures within ultrafine electronic interconnections, which change rapidly during the formation of such joints and evolve continuously thereafter under service conditions, are an important factor to be considered in order to accurately evaluate the reliability of electronic packages that contain such interconnects. By combining phase-field and finite-element mechanical modeling techniques, this work explicitly considers both the size and geometry of the joints to understand their effects on microstructural evolution and subsequent mechanical properties. The simulation results indicate that the degree of inhomogeneity of the stress distribution increases as the size of the joints is reduced when microstructure is considered. The calculated maximum stresses present in hourglass-shaped joints when considering microstructure are approximately 10MPa larger than those present in the corresponding joints when neglecting microstructure. The geometries of such interconnects also have a significant effect on their mechanical properties. Hourglass-shaped joints exhibit the lowest maximum von Mises stresses in comparison with the other shapes considered. In addition, the included microstructural features can introduce local stress concentrations within the microjoints, which may deteriorate the reliability and performance of the electronic packages. It is therefore recommended that the microstructure as well as the size and geometry of joints be considered among the design and fabrication parameters to enable reliable ultrafine interconnects. TMS, 2012 Microstructure nationallicence size and geometry effects nationallicence mechanical properties nationallicence phase-field method nationallicence ultrafine interconnects nationallicence Wu Zhiyong School of Physics and Engineering, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, China aut Huang Zhiheng School of Physics and Engineering, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, China aut Xiong Hua School of Physics and Engineering, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, China aut Conway Paul Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, LE11 3TU, Loughborough, Leicestershire, UK aut Liu Changqing Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, LE11 3TU, Loughborough, Leicestershire, UK aut Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/2(2013-02-01), 263-271 0361-5235 42:2<263 2013 42 11664 https://doi.org/10.1007/s11664-012-2201-8 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11664-012-2201-8 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wu Zhiyong School of Physics and Engineering, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, China aut NATIONALLICENCE 700 1- Huang Zhiheng School of Physics and Engineering, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, China aut NATIONALLICENCE 700 1- Xiong Hua School of Physics and Engineering, Sun Yat-sen University, 135 West Xingang Road, Guangzhou, China aut NATIONALLICENCE 700 1- Conway Paul Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, LE11 3TU, Loughborough, Leicestershire, UK aut NATIONALLICENCE 700 1- Liu Changqing Wolfson School of Mechanical and Manufacturing Engineering, Loughborough University, LE11 3TU, Loughborough, Leicestershire, UK aut NATIONALLICENCE 773 0- Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/2(2013-02-01), 263-271 0361-5235 42:2<263 2013 42 11664 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer