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Electromigration and 4D microtomography in Sn-Bi-In thermal joints

Grant number: 21/08436-9
Support Opportunities:Scholarships abroad - Research
Effective date (Start): February 01, 2023
Effective date (End): November 30, 2023
Field of knowledge:Engineering - Materials and Metallurgical Engineering - Physical Metallurgy
Principal Investigator:José Eduardo Spinelli
Grantee:José Eduardo Spinelli
Host Investigator: Nikhilesh Chawla
Host Institution: Centro de Ciências Exatas e de Tecnologia (CCET). Universidade Federal de São Carlos (UFSCAR). São Carlos , SP, Brazil
Research place: Purdue University, United States  

Abstract

This proposal aims to deepen the understanding of the microstructures formed in the as-soldered Sn-Bi-In/Copper joints. Sn-Bi-In alloys are becoming alternative applications for thermal joints, also known as Thermal Interface Materials (TIM) in microelectronic circuitry. This is because with the routine increase in the power density of microelectronic components and consequent heat generation, there is a need for advances towards miniaturization, performance improvements and greater reliability of the microelectronic systems. Hence, any TIM alloy must be characterized by high thermal conductivity and excellent wettability. The development of new TIM Sn-Bi, Sn-Sb, Sn-Bi-In and Sn-Bi-Ga alloys has been carried out in the M2PS (Microstructure and Properties in Solidification Processes) group at DEMa-UFSCar for at least 10 years (FAPESP Research Grant #2019/23673-7). In this proposal, it is aimed the use of advanced characterization techniques in the performance evaluation of Sn-Bi-In alloys under service conditions. This comprises electromigration and 4D microtomography tests with application of thermal cycling in order to evaluate the generation of defects and growth of the interfacial reaction layer simulating real applications. X-ray microtomography may be used on order to generate 3D reconstructions of both surface and internal features such as interfaces. This research also aims to provide the researcher and his team of students at DEMa-UFSCar with new skills in the evaluation of microelectronic interconnections. The choice of the Center for 4D Materials Science located at Purdue University is based on: i. Excellence in electronic materials research; ii. Experience of renowned researchers, such as Prof. Nikhilesh Chawla; and iii. High-level infrastructure to implement this proposal. The aim is to produce Sn-Bi-In/copper welded joints, manufacture the samples on a submillimeter geometry for evaluation of both electromigration and temperature variation in the formation of the interfacial layer and void generation. For interfaces in thermal joints, aspects such as wettability, thickness and nature of the IMC reaction layer (or possible layer-suppression), in addition to the dissolution of the substrate forming element and generated microstructure are of fundamental importance, which control not only thermal conductivity but also strength and corrosion. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
SCHON, ALINE FERREIRA; DE GOUVEIA, GUILHERME LISBOA; SOBRAL, BRUNO SILVA; SPINELLI, JOSE EDUARDO; RIVA, RUDIMAR; CAPELLA, ALINE GONCALVES; SILVA, BISMARCK LUIZ. Microstructure and hardness of laser remelted surfaces of Al-5%Cu and Al-4%Cu-1%Ni alloys. Journal of Alloys and Compounds, v. 954, p. 12-pg., . (21/08436-9, 19/23673-7)
DE OLIVEIRA FILHO, MARCOS FERNANDO; CARADEC, PIERRE D'AMELIO BRIQUET; CALSAVERINI, RAFAEL; SPINELLI, JOSE EDUARDO; ISHIKAWA, TOMAZ TOSHIMI. Neural network for classification of MnS microinclusions in steels. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T, v. 24, p. 11-pg., . (21/08436-9, 19/23673-7)
DE SOUSA, RAI BATISTA; PAIXAO, JEVERTON LAUREANO; DANTAS, SUYLAN LOURDES DE ARAUJO; DE FREITAS, PAMELLA RAFFAELA DANTAS; DA LUZ, JEFFERSON ROMARYO DUARTE; SPINELLI, JOSE EDUARDO; SILVA, BISMARCK LUIZ. Impact of Cooling Rate and Nickel Addition on the Dendritic Spacing, Ag3Sn Morphology and Cytotoxicity of Sn-2Ag Solder. JOURNAL OF ELECTRONIC MATERIALS, v. 52, n. 11, p. 23-pg., . (21/08436-9, 19/23673-7)
DA SILVA LEAL, JADERSON RODRIGO; VALENZUELA REYES, RODRIGO ANDRE; DE GOUVEIA, GUILHERME LISBOA; COURY, FRANCISCO GIL; SPINELLI, JOSE EDUARDO. Effects of Indium on Wetting and Interfacial Features of a Sn-40Bi Alloy in a Copper Substrate. JOURNAL OF ELECTRONIC MATERIALS, v. N/A, p. 14-pg., . (19/23673-7, 21/08436-9)
MARTINEZ, FELLIPE; DOS SANTOS JUNIOR, CARLOS; LEAL, JADERSON; SILVA, ARGOS; GOUVEIA, GUILHERME; SPINELLI, JOSE. Effects of Sc Addition and Direct Aging Treatment on Microstructure and Hardness of AlSi10Mg Alloy. ADVANCED ENGINEERING MATERIALS, v. N/A, p. 10-pg., . (19/21937-7, 21/08436-9, 19/23673-7)

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