Nanoindentation creep on Cu3Sn, Cu6Sn5 and (Cu, Ni)6Sn5 intermetallic compounds grown in electrodeposited multilayered thin film
Document Type
Article
Publication Date
1-1-2018
Abstract
Tin-based multilayered thin films were fabricated for application in three dimensional microelectronic packaging as joining materials. During device fabrication and application, interconnecting materials can be fully converted to intermetallic compounds (IMCs). As known, IMCs are generally brittle and associated with void formation which can make interconnection in the microelectronic devices vulnerable. In an effort to improve the reliability of the Sn–Cu based IMC, ultra thin layers of Ni (70 nm) were inserted into Cu/Sn system. Electrochemical deposition technique was used to fabricate the samples. Isothermal aging at 150 °C for 168 h was performed to grow the IMCs at required thickness for measuring creep by nanoindentation. Creep strain rate was calculated from experimental data. Creep resistance was significantly improved after adding the small amount of Ni in Cu/Sn multilayered thin film system.
Keywords
Creep strain rate, Device fabrications, Electrochemical deposition, Joining materials, Micro-electronic devices, Microelectronic packaging, Multilayered thin films, Nanoindentation creeps
Divisions
fac_eng
Funders
High Impact Research grant, University of Malaya from Ministry of Higher Education, Malaysia (Project No. UM.C/625 /1/HIR/ MOHE/ENG/26)
Publication Title
Journal of Materials Science: Materials in Electronics
Volume
29
Issue
2
Publisher
Springer