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As one of the most important kinds of distributed generation systems, the micro turbine generation system can be flexibly installed near the end user, and becomes an important trend of development in DGS gradually. The high speed permanent magnetic generator (HSPMG) can be properly applied in a micro turbine generation system and benefits the system from high efficiency, high power density, simple...
Numerical simulation of micro-bumped flip chips mounted on a TSV interposer is conducted to study the thermal performance of the package. The 3D package, which consists of two chips, each dissipating 4W, is evaluated under various conditions with its thermal resistances θja θjb, θjc and θjma determined according to JEDEC or MIL-STD standard. Instead of building the detailed model, equivalent thermal...
We present a novel thermal conductivity detector design in which output is minimally affected by changing flow rates in a microchannel. In gas chromatography systems, pressure fluctuations can result in false peaks and an unstable baseline, reducing the systems limit of detection. Furthermore, ramping the temperature of a separation column, used in many chemical separations, changes the viscosity...
Micro-Thermal Conductivity Detectors (µTCDs) have been designed, fabricated and tested in a gas chromatography system to show a correlation between detector design and the mean free path of the carrier gas. Our tests show that for a fixed detector design, the maximum possible response is limited by the Knudsen number (the ratio of the mean free path of the gas and chamber critical dimensions). Therefore,...
Because of Moore's (scaling/integration) law, the Cu/low-k silicon chip is getting bigger, the pin-out is getting higher, and the pitch is getting finer. Thus, the conventional organic buildup substrates cannot support these kinds of silicon chips anymore. To address these needs, Si interposer with TSV has emerged as a good solution to provide high wiring density interconnection, to minimize CTE mismatch...
Design, fabrication and testing of a micro thermal conductivity detector (muTCD) with a detection limit of 260 parts per billion (hexane in helium), no excess dead-volume, low power consumption, fast response time (150 musec) and low sensitivity to flow rate is described herein. Significantly, this muTCD is shown to have a linear response and high sensitivity across a 104-fold concentration range;...
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