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Article: Brittle-to-ductile transition of Au2Al and AuAl2 intermetallic compounds in wire bonding

TitleBrittle-to-ductile transition of Au<inf>2</inf>Al and AuAl<inf>2</inf> intermetallic compounds in wire bonding
Authors
Issue Date2019
Citation
Journal of Materials Science: Materials in Electronics, 2019, v. 30, n. 1, p. 862-866 How to Cite?
AbstractAu–Al intermetallic compounds (IMCs) were conventionally regarded as damage sources within wire bonding interfaces. Among the Au–Al IMCs system, Au2Al and AuAl2 IMCs were commonly observed after long-term service. Here, the intrinsic mechanical properties of Au2Al and AuAl2 IMCs were investigated by in-situ bending tests. The results clearly revealed that the transition from brittle to ductile facture behavior was determined by the atomic ratio of Au and Al elements, while Al-rich Au–Al IMC exhibits higher bending strength than that of Au-rich Au–Al IMC. The Al-rich Au–Al IMC such as AuAl2 indeed showed brittle fracture behavior, in which cracks propagated through the grain boundaries. In contrast, the Au-rich Au–Al IMC such as Au2Al appeared to be quite ductile and crack resistant, and its plastic deformation was undertaken by slip bands. This work suggested that not all Au–Al IMCs cause brittleness and lead to damages, only Al-rich IMCs should be avoided at wire bonding interfaces.
Persistent Identifierhttp://hdl.handle.net/10722/326168
ISSN
2023 Impact Factor: 2.8
2023 SCImago Journal Rankings: 0.512
ISI Accession Number ID

 

DC FieldValueLanguage
dc.contributor.authorYang, Haokun-
dc.contributor.authorCao, Ke-
dc.contributor.authorZhao, Xiao Tian-
dc.contributor.authorLiu, Wei-
dc.contributor.authorLu, Jian-
dc.contributor.authorLu, Yang-
dc.date.accessioned2023-03-09T09:58:31Z-
dc.date.available2023-03-09T09:58:31Z-
dc.date.issued2019-
dc.identifier.citationJournal of Materials Science: Materials in Electronics, 2019, v. 30, n. 1, p. 862-866-
dc.identifier.issn0957-4522-
dc.identifier.urihttp://hdl.handle.net/10722/326168-
dc.description.abstractAu–Al intermetallic compounds (IMCs) were conventionally regarded as damage sources within wire bonding interfaces. Among the Au–Al IMCs system, Au2Al and AuAl2 IMCs were commonly observed after long-term service. Here, the intrinsic mechanical properties of Au2Al and AuAl2 IMCs were investigated by in-situ bending tests. The results clearly revealed that the transition from brittle to ductile facture behavior was determined by the atomic ratio of Au and Al elements, while Al-rich Au–Al IMC exhibits higher bending strength than that of Au-rich Au–Al IMC. The Al-rich Au–Al IMC such as AuAl2 indeed showed brittle fracture behavior, in which cracks propagated through the grain boundaries. In contrast, the Au-rich Au–Al IMC such as Au2Al appeared to be quite ductile and crack resistant, and its plastic deformation was undertaken by slip bands. This work suggested that not all Au–Al IMCs cause brittleness and lead to damages, only Al-rich IMCs should be avoided at wire bonding interfaces.-
dc.languageeng-
dc.relation.ispartofJournal of Materials Science: Materials in Electronics-
dc.titleBrittle-to-ductile transition of Au<inf>2</inf>Al and AuAl<inf>2</inf> intermetallic compounds in wire bonding-
dc.typeArticle-
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s10854-018-0357-6-
dc.identifier.scopuseid_2-s2.0-85057313011-
dc.identifier.volume30-
dc.identifier.issue1-
dc.identifier.spage862-
dc.identifier.epage866-
dc.identifier.eissn1573-482X-
dc.identifier.isiWOS:000456048800092-

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