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A new carbon-nanotube-based (CNTs) heat sink is developed. Due to their high thermal conductivity and aspect ratio, CNT boundles are used as fins of the heat sink. Fins as high as 300 µm with an aspect ratio of 30 are fabricated. For the thermal characterization of the heat sink, a microheater is integrated with the heat-sink and it is also used as temperature sensor. It is realized by using the low...
Multi-element resistor rosettes on silicon are widely utilized to measure integrated circuit die stress in electronic packages and other applications. Past studies of many sources of error have led to rosette optimization and demonstrated that temperature-compensated stress extraction should be used whenever possible. In this work, we extend the error analysis to include the inherent uncertainty in...
Temperature is a crucial parameter in many planar technology processing steps. However, the determination of the actual temperature history at the device side of the substrate is not straightforward. We present a novel method for determining the temperature history of the process side of silicon wafers and chips, which is based on well-known silicide formation reactions of metal-Si systems and is...
We present a dedicated measurement set-up for the electrical characterization of semiconductor devices and microsystems under very high temperature conditions. The experimental set-up comprises a vacuum system as basic unit and a number of sample stages for different applications. The system enables measurements in the temperature range between room temperature and at least 700degC. We give a detailed...
Stress sensing test chips are widely utilized to investigate integrated circuit die stresses arising from assembly and packaging operations. In order to utilize these test chips to measure stresses over a wide range of temperatures, one must have values of six piezoresistive coefficients for n- and p-type silicon over the temperature range of interest. However, the literature provides limited data...
The present work aims at studying the cooling performance of a thermoelectric device that integrated with integrated heat spreader (IHS) on a flip-chip plastic ball grid array (FC-PBGA) package. The new thermoelectric device herein is fabricated on the metal substrates by flip-chip assembly process. Thermal performance of the new package was comprehensive studied. The thermal resistances of IHS with/without...
In this study, we fabricated in-plane thermoelectric micro-generators (4 mm times 4 mm) based on bismuth telluride thin films by using flash evaporation method. The thermoelectric properties of as-grown thin films are lower than those of bulk materials. Therefore the as-grown thin films were annealed in hydrogen at atmospheric pressure for 1 hour in a temperature range of 200 degC. to 400degC. By...
In deep submicron era, to prevent larger amount of SRAM from more frequently encountered overheating problems and react accordingly for each possible hotspots, multiple ideal run-time temperature sensors must be closely located and response rapidly to secure system reliability while maintaining core frequency. This paper presented a method to extract run-time temperature information from multiple...
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