Abstract
A micro-channel heat sink is a promising cooling method for high power integrated circuits (IC). However, the understanding of such a micro-channel device is not sufficient, because the tools for studying it are very limited. The details inside the micro-channels are not readily available. In this letter, a micro-channel heat sink is comprehensively studied using the integrated temperature sensors. The highly sensitive thin film temperature sensors can accurately monitor the temperature change in the micro-channel in real time. The outstanding heat dissipation performance of the micro-channel heat sink is proven in terms of maximum temperature, cooling speed and heat resistance. The temperature profile along the micro-channel is extracted, and even small temperature perturbations can be detected. The heat source formed temperature peak shifts towards the flow direction with the increasing flow rate. However, the temperature non-uniformity is independent of flow rate, but solely dependent on the heating power. Specific designs for minimizing the temperature non-uniformity are necessary. In addition, the experimental results from the integrated temperature sensors match the simulation results well. This can be used to directly verify the modeling results, helping to build a convincing simulation model. The integrated sensor could be a powerful tool for studying the micro-channel based heat sink.
Highlights
IntroductionWith the development of microelectronics technology, transistors in an integrated circuit (IC)
With the development of microelectronics technology, transistors in an integrated circuit (IC)keep scaling down
The thin film temperature sensors are fabricated on the surface of Chip B and correspond with the central fluidic channel
Summary
With the development of microelectronics technology, transistors in an integrated circuit (IC). The heat flux concomitantly rises up due to the shrinking dimension, and severe hot spots are formed [1]. The problem of thermally induced failure gradually becomes a bottleneck restricting the further development of microelectronic technology. Thermal management is important today [2,3]. Compared with the conventional thermal management technologies, the micro-channel based heat sink has outstanding heat dissipation performance [4,5,6]. Fabricated using micro processing, the micro-channel heat sink can be integrated with semiconductor chips, and it is becoming one of the most
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