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Preparation of Oxidation-Resistant Ag-Cu Alloy Nanoparticles by Polyol Method for Electronic Packaging.
- Source :
- Journal of Electronic Materials; Feb2019, Vol. 48 Issue 2, p1286-1293, 8p
- Publication Year :
- 2019
-
Abstract
- Ag or Cu metal nanoparticle paste can be used as a bonding material for electronic packaging applications. However, Ag nanoparticle paste has some drawbacks including high cost and being prone to ion migration in high-humidity conditions. The main obstacle to using Cu nanoparticle paste is rapid oxidation in air during heating. In this work, we describe a method to prepare Ag-Cu alloy nanoparticle paste by a polyol chemical reduction method combined with subsequent concentration. Characterization with ultraviolet-visible spectroscopy, transmission electron microscopy, x-ray photoelectron spectroscopy and energy dispersive spectrometry confirm the formation of the Ag-Cu alloy structure. During the synthesis of Ag-Cu alloy nanoparticles, an Ag core forms initially, followed by codeposition of Ag and Cu. Most of the Ag-Cu alloy nanoparticles have a truncated octahedral shape with twin structures located at the edges. This Ag-Cu alloy nanoparticle paste has a good oxidation resistance up to 350°C in air atmosphere. Using the Ag-Cu alloy nanoparticle paste, joints were formed at a low sinter-bonding temperature of 160°C. Shearing tests confirm the formation of robust joints, with an average shear strength of 50 MPa. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 03615235
- Volume :
- 48
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Journal of Electronic Materials
- Publication Type :
- Academic Journal
- Accession number :
- 134039497
- Full Text :
- https://doi.org/10.1007/s11664-018-6771-y