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The Leadframe-Epoxy molding compound (EMC) interface is known to be one of the weakest interfaces in an electronic packaging exhibiting delamination during reliability test. Interfaces of EMC and leadframes with different metal coatings exhibit different failure mode behavior after environmental aging because of the different adhesion strengths. In this paper, the interface microstructure of EMC-leadframes...
Compared to conventional metal heat sinks, CNT-based microfins have exceptional advantage to drag heat out from electronic components due to the unique thermal and mechanical properties of the material. This paper will review the state of CNTs applied as cooling fins in microelectronic systems. The latest progresses will be presented.
Conventional lead-free solders, with a solder alloy particle size in the micrometer range, present some major disadvantages, such as relatively high melting temperatures, which can result in defects and build up stresses during reflow processing, and limited application for high density, ultra- small pitch electronic applications. By decreasing the size of the solder alloy particles to the nanometer...
Nanopowders of Sn-3.0Ag-0.5Cu (wt.%) alloy, which has the promising potential applications in microelectronics packaging as the lead free solder, were prepared under the protection of three various coolants. The oxidation of the nanopowders was measured by X-ray diffraction (XRD) and other relative methods to compare the protection of the nanopowders during their preparation. Moreover, the scanning...
Thermal management in electronics packaging is becoming more rigorous with the increase of IC power. A common method is to transfer heat from the heat generating devices using a heat dissipation member, for example heat sink. Thermal interface material (TIM) is applied between the heat source component and the thermally conductive member to offer a fast heat dissipation path. Nano thermal interface...
Summary form only given. One important function of microsystem packaging is to remove the heat generated by the integrated circuits (ICs). The thermal management of microsystems has now become more crucial as the power density of ICs increases dramatically. To remove the big amount of heat is a big challenge for the packaging technology. An attractive solution is to utilize new developed nanotechnologies...
Today's technology is tuned towards faster, smaller and better efficiency. This trend has resulted in tremendous heat being generated in microelectronics components and if not properly managed, it can result in failure of microelectronics components. A critical issue is the removal of this heat generated. We report here a new type of nano thermal interface material (Nano-TIM) using the electrospinning...
The 2D CFD simulations have been carried out for a series of CNT micro-fin cooling architectures in this paper. The influence of micro-fin structures, fluid speeds and heating powers on cooling effects have been obtained in the case studies, and the numerical results have been compared with our experiment data. The CFD simulations indicate that the fluid speed is the key factor of heat transfer, and...
This paper reports the results of an investigation to create a thermal interface material (TIM) with adhesive functions. Previous tests with electro-spun nano fibrous polymer materials indicate high thermal conductivity of the films, and even higher thermal conductivity and lower resistivity had subsequently been obtained by adding thermally conductive nano particles. The thickness of the TIMs produced...
Since 1991, carbon nanotubes have been considered for successful applications in various fields due to their unique properties. In the present work, carbon nanotubes are applied in integrated circuit packaging, as the bump interconnection for flip chip. The reason for choosing carbon nanotubes as the bump material is their special electrical, mechanical and thermal properties, which may promote both...
Nanoparticles of Sn-4.0Ag-0.5Cu and Sn-0.4Co-0.7Cu (wt% composition) lead free solder alloys were manufactured and characterized for potential applications in microelectronics packaging. Scanning electron microscopy (SEM) analysis was carried out in order to study the morphology and size distribution of the nanoparticles. It was observed that nanoparticles of lead free alloys were almost spherical...
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