Lattice Boltzmann method study of effect three dimensional stacking-chip package layout on micro-void formation during encapsulation process

Ishak, M. H. H.; Abdullah, M. Z.; Abas, Aizat

doi:10.1016/j.microrel.2016.07.002

Cited by 15 publications

(11 citation statements)

References 27 publications

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“…The addition of nanoparticles in the molten solder has been found to improve the voiding properties in the solder. Based on the computed trajectory of the nanoparticles, it was found that the presence of higher concentration of nanoparticles will increase the domain of higher pressure region henceforth reducing the possibility of micro-void formation as supported by researches done Abas et al (2015) and Ishak et al (2016). From the previous study, it was also found that higher pressure region enables flow front to combine thus further inhibits void formation in solder joint .…”

Section: Pressure Distributionmentioning

confidence: 75%

Effect of Different S AC Based Nanoparticles Types on the Reflow Soldering Process of Miniaturized Component using Discrete Phase Model Simulation

Mukhtar¹,

Abas²,

Haslinda³

et al. 2019

JAFM

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The wetting formation and nanoparticles dispersion on adding nanoparticles to the lead free solder Sn-3.0Ag-0.5Cu (SAC305) is methodically investigated using Discrete Phase Model (DPM) simulation and applied on a 01005 capacitor component. Different types of nanoparticles, namely titanium dioxide (TiO2), nickle oxide (NiO) and Iron (III) oxide (Fe2O3) with varying weight percentages, 0.01wt%, 0.05wt% and 0.15wt% that is doped in SAC305 are used. The study of two-way interactions between multiphase volume of fluid (VOF) and discrete phase model (DPM) shows excellent capability in tracking the dispersed nanoparticles immersed in the wetted molten solder. In this study, real reflow profile temperature setup will be used to mimic the conventional reflow process. Based on the findings, the fillet height managed to achieve the minimum required height set by IPC standards. As the concentration of the nanoparticles doped in the molten solder increases, higher time is required for the wetting process. In general, the doped NiO nanoparticles at 0.05wt% has the lowest wetting time compared to other cases. The study of the instantaneous nanoparticles trajectory tracking was also conducted on a 3D model and 2D cross sectional view to identify the exact movement of the particles. Additionally, it was also observed that the velocity and pressure distribution increases as the weight percentage of the nanoparticles increases.

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Section: Pressure Distributionmentioning

confidence: 75%

Effect of Different S AC Based Nanoparticles Types on the Reflow Soldering Process of Miniaturized Component using Discrete Phase Model Simulation

Mukhtar¹,

Abas²,

Haslinda³

et al. 2019

JAFM

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“…This was proven in a research by A. Abas et al [13] and M. H.H Ishak et. As the size of the particles in the nano-scale, the nanoparticles are exerted velocity same as the al [14] which found that the possibility of void formation is lower at higher pressure distribution. Figure 4 depicted the plot of wetting time against wetting percentage for different weight percentage of the nanoparticles.…”

Section: Numerical Simulation Setupmentioning

confidence: 83%

Discrete Phase Model (DPM) study of nano-reinforced Lead Free Solder Sn-3.0Ag-0.5Cu (SAC305)

Mukhtar¹,

Abas

Haslinda

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. This paper presents a preliminary study of the interaction between two models of numerical simulation namely volume of fluid (VOF) and discrete phase model (DPM). The multiphase-DPM model is capable of tracking the trajectory of the TiO2 nanoparticles that has been doped in the lead free solder Sn-3.0Ag-0.5Cu (SAC305). The current model was developed based on passive surface mount component 01005 capacitor that undergoes conventional reflow process. The trajectory of the nanoparticles at 0.01, 0.05 and 0.15wt% in the molten solder is shown in the flow front of the wetted molten solder. At 0.05wt% of nanoparticles, good dispersion of nanoparticles, pressure distribution and wetting time was found. The difference in wetting time are about 3.76% and 0.46% for 0.05wt% and 0.15wt% compared to 0.01wt% nanoparticle. The trajectory of the nanoparticles are shown to move along with the wetting formation of the molten solder. The pressure distribution and velocity vector of the different weight percentage of nanoparticles are also be studied. Higher pressure distribution is found at the capacitor area and intermetallic compound (IMC) region. The higher pressure distribution projected to reduce the micro void formation and optimize the reliability of the solder joint.

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“…Lattice Boltzmann Method (LBM) can provide a faster solution than traditional CFD methods as Finite Difference Method and Finite Volume Method but it needs more memory [1]. In traditional CFD methods, nonlinear partial differential equations are converted to non-linear boundary and "bounce-back" wall boundary conditions are widely used [5,6].…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Incompressible Forced Convection in a Channel with a Rectangular Prism

Ozsaban

Aslan

Güven

2020

Sakarya University Journal of Science

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The aim of the present study is to investigate the effects of the rectangular prism on forced convection in a channel with the Lattice Boltzmann Method (LBM). In this context, numerical analysis of steady and unsteady incompressible flow and heat transfer has been done in a twodimensional straight parallel channel. Momentum and energy transport are modelled with LBM. This study is used as a single relaxation time rule with a uniform square lattice structure. Different Reynolds numbers (50 and 1000) and constant Prandtl number value (0.7) have been investigated. In this study Nusselt number has been calculated for channel flow with rectangular prism and it was compared with an empty channel. Streamlines and isotherms were presented for the above-mentioned cases. LBM results were validated by commercial CFD code with the same conditions. It is found from results that Nusselt number with a rectangular prism in a channel was increased and the flow goes to transient form at Re=1000. Also, LBM code results are similar accuracy with commercial CFD code.

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Lattice Boltzmann method study of effect three dimensional stacking-chip package layout on micro-void formation during encapsulation process

Cited by 15 publications

References 27 publications

Effect of Different S AC Based Nanoparticles Types on the Reflow Soldering Process of Miniaturized Component using Discrete Phase Model Simulation

Effect of Different S AC Based Nanoparticles Types on the Reflow Soldering Process of Miniaturized Component using Discrete Phase Model Simulation

Discrete Phase Model (DPM) study of nano-reinforced Lead Free Solder Sn-3.0Ag-0.5Cu (SAC305)

Numerical Investigation of Incompressible Forced Convection in a Channel with a Rectangular Prism

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