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- Publisher
- Emerald Publishing
- Copyright
- Copyright © Emerald Group Publishing Limited
- ISSN
- 0954-0911
- DOI
- 10.1108/SSMT-07-2016-0015
- Publisher site
- See Article on Publisher Site
Abstract
PurposeThis paper aims to investigate Cu/SnAgCu/Cu transient liquid phase (TLP) bonding with different thicknesses for three-dimensional (3D) integrated circuit (IC).Design/methodology/approachThis paper includes experiments and finite element simulation.FindingsThe growth rate of the intermetallic compound layer during TLP soldering was calculated to be 0.6 μm/s, and the small scallop-type morphology Cu6Sn5 grains can be observed. With the decrease in thickness in solder joint, the thickness of intermetallic compounds represents the same size and morphology, but the size of eutectic particles (Ag3Sn, Cu6Sn5) in the matrix microstructure decrease obviously. It is found that with the increase in thickness, the tensile strength drops obviously. Based on finite element simulation, the smaller value of von Mises demonstrated that the more reliability of lead-free solder joints in 3D IC.Originality/valueThe Cu/SnAgCu/CuTLPbondingwithdifferentthicknessesfor3D IC was investigated.
Journal
Soldering & Surface Mount Technology – Emerald Publishing
Published: Jun 5, 2017