Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 13 of 13 for “"underfill"”.
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Underfill material selection for flip chip technology
Six underfill materials were examined for the selection of an appropriate underfill material for Digital Equipment Corporation's flip chip development project. Several tests were performed to determine the material properties, process properties, and the reliability of each underfill material. A …
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Study on the Nanocomposite Underfill for Flip-Chip Application
Underfill material is a special colloidal dispersion system with silicon dioxide particles in the organic liquid. It is used to improve the reliability of integrated circuits (IC) packaging in the microelectronics. In order to successfully synthesize the nanocomposite underfill meeting the …
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Influence of Underfill on Ball Grid Array (BGA) Package Fatigue Life
<p>The influence of underfill material properties on the fatigue life of Ball Grid Array (BGA) packages that are subjected to thermal cycling is investigated in this study. A finite element model is created using Ansys by assuming the existence of an infinite array of solder interconnects, …
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Effects of underfill material on solder deformation and damage in 3D packages
… periodic boundary condition and the presence of underfill material on the stress and strain fields and evolution of failure of an FEA model that is representative of a solder joint in a 3D IC package. The model solder joint is placed between two silicon substrates in contact with through-silicon …
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Numerical analysis of surface mount electronics with viscoelastic epoxy underfills and potting
… Cracking of encapsulants or ceramic components, underfill debonding, and solder fatigue are just a few of the potential failure mechanisms that may result. An extensive numerical parameter study was performed to investigate the response representative surface mount components to thermal cycling. …
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DEVELOPMENT AND IN-SITU CHARACTERIZATION OF BI-LAYERED LAMINATED COMPOSITES FOR ENHANCED MOISTURE BARRIER PERFORMANCE
… power MOSFETs by the application of different underfill and potting encapsulations to determine stresses and strains on the solder bumps.
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Surface mounted PCB cleaning process improvement and Its impact on manufacturing system performance
… problems like electro-migration, improper mold underfill and increase the chances of failure. This project explores alternative methods for the cleaning process and also identifies the important factors involved in cleaning. A model of the SMT assembly line was created using ARENA software and …
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Design of experiment analysis of an electronics package lid using finite element analysis
… they account for the performance of die attach/ underfill materials regardless of the small thickness of the layer. The FEA data are finally used to conduct a design of experiments (DOE) analysis to investigate the influence of 3 distinct designs and 6 material choices on warpage of a lid. The …
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Renal Epithelial Sodium Channel (ENaC) Regulation of Pregnancy Mediated Hemodynamic Adaptations: Mechanistic Insights
… theme of pregnancy as a state of arterial underfilling. We performed a Na transporter profile in kidney cortex homogenates from animals treated chronically with vasodilators (nifidipine or sodium nitrate). We found that only the abundance of transporters in the distal nephron (NCC, ENaC, …
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Processing and Reliability Assessment of Solder Joint Interconnection for Power Chips
… process for improved solder joint geometry, underfilling solder joint with encapsulant and applying flexible substrate in the assembly. The third objective is the implementation of solder joint interconnection technique in developing chip-scale power packages and a three-dimensional …
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Low Volume Dispensing with High Speed Dispensers
<p>With the high pace of innovation in the semiconductor manufacturing industry, there has been an increasing demand for more energy efficient and environmental friendly products. This research relates to a complex process of fluid dispensing at low volumes on a printed circuit board. Currently, a …