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Hundred-fold improvement in temperature mapping reveals the stresses inside tiny transistors

26/08/2015 0 News
Used in everything from cell phones to supercomputers, modern microelectronic circuits contain billions of nanometer-scale transistors, each generating tiny amounts of heat that collectively can compromise the performance of the device. Seeing where the heat is generated provides valuable information for circuit designers to probe where failures are occurring and to realize the next generation microprocessors. Electrons passing through a sample excite collective charge oscillations called plasmons. Monitoring the energy required to excite the plasmons enables measuring local variations in a sample's density, which are directly related to the local temperature within an integrated circuit or transistor. Based on these principles, the researchers developed a new technique called plasmon energy expansion thermometry, or PEET. It enables measuring local temperature with 3-5 K precision and 5 nm spatial resolution. The new technique provides 100-fold better resolution than optical pyrometry. The new technique is the only technique that allows correlation of atomically resolved structure to a device's thermal characteristics. Source: ScienceDaily

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