The effective permeability of the underfill flow domain in flip-chip packaging

Three dimensional CFD simulation of non-Newtonian flow for the underfill flow in flip chip packaging

In the present paper, a finite volume method (FVM) based software is used in the simulation of simulation of non Newtonian flow between two parallel plates and flip chip packaging are presented. 3D of two parallel plates with different gap heights are developed and simulated by Computational Fluid Dynamic (CFD) code, FLUENT 6.3.26. The power law equation was used to describe the NonNewtonian be...

Plasma for Underfill Process in Flip Chip Packaging

Driven by the fast growing demand for smaller, faster, and higher I/O electronic devices, flip chip technology has attracted significant attention in the electronic packaging industry. Flip chip is a proven packaging technology due to its high performance, reduced form factor, and greater I/O density. In successful flip chip packaging, the underfill process plays an important role because it ca...

Analysis and Modeling of Underfill Flow Driven by Capillary Action in Flip-chip Packaging

the effects of changing roughness on the flow structure in the bends

flow in natural river bends is a complex and turbulent phenomenon which affects the scour and sedimentations and causes an irregular bed topography on the bed. for the reason, the flow hydralics and the parameters which affect the flow to be studied and understand. in this study the effect of bed and wall roughness using the software fluent discussed in a sharp 90-degree flume bend with 40.3cm ...

Dynamic Filling Characteristics of a Capillary Driven Underfill Process in Flip-Chip Packaging

This study investigates the dynamic flow characteristics of capillary-driven underfill flows in a flip chip package. In the present study, we used two different bump arrays using Sn-2.5Ag solder balls with 80 mm and 100 mm diameters on commercially available flip chips, which have different pitches of 150 mm and 180 mm. First, we measured surface tension and viscosity with a rheometer and a ten...