Implications of Pb-free microelectronics assembly in aerospace applications

determination of maximal singularity free zones in the workspace of parallel manipulator

due to the limiting workspace of parallel manipulator and regarding to finding the trajectory planning of singularity free at workspace is difficult, so finding a best solution that can develop a technique to determine the singularity-free zones in the workspace of parallel manipulators is highly important. in this thesis a simple and new technique are presented to determine the maximal singula...

Solder Joint Reliability of Pb-free Sn-Ag-Cu Ball Grid Array (BGA) Components in Sn-Pb Assembly Process

For companies that choose to take the Pb-free exemption under the European Union’s RoHS Directive and continue to manufacture tin-lead (Sn-Pb) electronic products, there is a growing concern about the lack of Sn-Pb ball grid array (BGA) components. Many companies are compelled to use the Pb-free Sn-Ag-Cu (SAC) BGA components in a Sn-Pb process, for which the assembly process and solder joint re...

Biogas Technology, Applications, Perspectives and Implications

The major purpose of this study was to examine the advantages and implications of biogastechnology in the agriculture sector. Biogas is one of many biomass energy sources, which includeanything that was once alive and that can generate energy (except for fossil fuels, which are notrenewable). To talk of biogas is to talk of agriculture, since biogas generation starts withagricultural waste prod...

Implications of China’s Aerospace Industrial Policies

Keynote CONTROLLED GROWTH OF CARBON NANOTUBES FOR APPLICATIONS IN MICROELECTRONICS

The outstanding properties of carbon nanotubes (CNTs) make them interesting for applications in microelectronics. It has been shown that they have outstanding current carrying capacity and thermal conductivity, which makes them potential candidates for interconnects on chips. Moreover, field-effect transistors based on single walled CNTs have been widely demonstrated and outperform silicon-base...