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IMCs Microstructure Evolution Dependence of Mechanical Properties for Ni/Sn/Ni Micro Solder-Joints
The current miniaturization trend of microelectronic devices drives the size of solder joints to continually scale down. The miniaturized joints considerably increase intermetallic compounds (IMCs) volume fraction to trigger mechanical reliability issues. This study investigated precise relationship...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6981565/ https://www.ncbi.nlm.nih.gov/pubmed/31935984 http://dx.doi.org/10.3390/ma13010252 |
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author | Ren, Ning Fang, Heng Wang, Dong Hou, Chenyi Zhao, Yatao Chen, Fan Tian, Ye Paik, Kyung-Wook Wu, Yiping |
author_facet | Ren, Ning Fang, Heng Wang, Dong Hou, Chenyi Zhao, Yatao Chen, Fan Tian, Ye Paik, Kyung-Wook Wu, Yiping |
author_sort | Ren, Ning |
collection | PubMed |
description | The current miniaturization trend of microelectronic devices drives the size of solder joints to continually scale down. The miniaturized joints considerably increase intermetallic compounds (IMCs) volume fraction to trigger mechanical reliability issues. This study investigated precise relationships between varying IMC volumes and mechanical properties of Ni/Sn(20μm)/Ni micro-joints. A designed method that followed the IMC volume as the only variable was used to prepare micro-joint samples with different IMC volumes. The continuously thickened Ni(3)Sn(4) IMCs exhibited a noticeable morphology evolution from rod-like to chunky shape. The subsequent tensile tests showed unexpected tensile strength responses as increasing Ni(3)Sn(4) volume, which was strongly associated with the Ni(3)Sn(4) morphological evolutions. Fractographic analysis displayed that the ductile fracture dominates the 20%–40% IMC micro-joints, whereas the brittle fracture governs the 40%–80% IMC micro-joints. For the ductile fracture-dominated joints, an abnormal reduction in strength occurred as increasing IMCs volume from 20% to 40%. This is primarily due to severe stress concentrations caused by the transformed long rod-typed morphology of the Ni(3)Sn(4). For the brittle fracture-dominated joints, the strength appeared a monotonous increase as the Ni(3)Sn(4) volume increased. This may be attributed to the increased crack resistance resulting from continuous coarsening of the chunky Ni(3)Sn(4) without any voids. Moreover, the finite element analysis was provided to further understand the joint failure mechanisms. |
format | Online Article Text |
id | pubmed-6981565 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-69815652020-02-03 IMCs Microstructure Evolution Dependence of Mechanical Properties for Ni/Sn/Ni Micro Solder-Joints Ren, Ning Fang, Heng Wang, Dong Hou, Chenyi Zhao, Yatao Chen, Fan Tian, Ye Paik, Kyung-Wook Wu, Yiping Materials (Basel) Article The current miniaturization trend of microelectronic devices drives the size of solder joints to continually scale down. The miniaturized joints considerably increase intermetallic compounds (IMCs) volume fraction to trigger mechanical reliability issues. This study investigated precise relationships between varying IMC volumes and mechanical properties of Ni/Sn(20μm)/Ni micro-joints. A designed method that followed the IMC volume as the only variable was used to prepare micro-joint samples with different IMC volumes. The continuously thickened Ni(3)Sn(4) IMCs exhibited a noticeable morphology evolution from rod-like to chunky shape. The subsequent tensile tests showed unexpected tensile strength responses as increasing Ni(3)Sn(4) volume, which was strongly associated with the Ni(3)Sn(4) morphological evolutions. Fractographic analysis displayed that the ductile fracture dominates the 20%–40% IMC micro-joints, whereas the brittle fracture governs the 40%–80% IMC micro-joints. For the ductile fracture-dominated joints, an abnormal reduction in strength occurred as increasing IMCs volume from 20% to 40%. This is primarily due to severe stress concentrations caused by the transformed long rod-typed morphology of the Ni(3)Sn(4). For the brittle fracture-dominated joints, the strength appeared a monotonous increase as the Ni(3)Sn(4) volume increased. This may be attributed to the increased crack resistance resulting from continuous coarsening of the chunky Ni(3)Sn(4) without any voids. Moreover, the finite element analysis was provided to further understand the joint failure mechanisms. MDPI 2020-01-06 /pmc/articles/PMC6981565/ /pubmed/31935984 http://dx.doi.org/10.3390/ma13010252 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Ren, Ning Fang, Heng Wang, Dong Hou, Chenyi Zhao, Yatao Chen, Fan Tian, Ye Paik, Kyung-Wook Wu, Yiping IMCs Microstructure Evolution Dependence of Mechanical Properties for Ni/Sn/Ni Micro Solder-Joints |
title | IMCs Microstructure Evolution Dependence of Mechanical Properties for Ni/Sn/Ni Micro Solder-Joints |
title_full | IMCs Microstructure Evolution Dependence of Mechanical Properties for Ni/Sn/Ni Micro Solder-Joints |
title_fullStr | IMCs Microstructure Evolution Dependence of Mechanical Properties for Ni/Sn/Ni Micro Solder-Joints |
title_full_unstemmed | IMCs Microstructure Evolution Dependence of Mechanical Properties for Ni/Sn/Ni Micro Solder-Joints |
title_short | IMCs Microstructure Evolution Dependence of Mechanical Properties for Ni/Sn/Ni Micro Solder-Joints |
title_sort | imcs microstructure evolution dependence of mechanical properties for ni/sn/ni micro solder-joints |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6981565/ https://www.ncbi.nlm.nih.gov/pubmed/31935984 http://dx.doi.org/10.3390/ma13010252 |
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