The trend of electronic device miniaturization, from the microscale to the nanoscale, presents a temperature measurement challenge. The available techniques have limitations in terms of either resolution, calibration, acquisition time, or equipment cost. Here we demonstrate a thermography technique called hyperspectral quantum rod thermal imaging (HQTI), which exploits temperaturedependent photoluminescence (PL) emission of quantum rods to obtain the surface temperature map of a biased electronic device, with a straightforward calibration. This method uses relatively simple, low-cost equipment, while achieving submicrometer spatial resolution. This technique is demonstrated by measuring the thermal map of a direct current (dc) operated gallium nitride (GaN) high electron mobility transistor (HEMT), achieving a temperature precision of ∼4 °C and an ∼700−800 nm estimated lateral optical resolution. This is a versatile method for measurement both in submicrometer scale regions of interest and of larger areas in the hundreds of micrometers range.

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The trend of miniaturization and rapid progress in the cost-competitive microelectronic industry require high resolution, fast, accurate and cost-effective thermal characterization techniques. These techniques aid the assessment of reliability and performance benchmarking of new device designs for the realistic operation conditions. We present a time resolved, surface sensitive, sub-micron resolution wide field thermal imaging technique, exploiting fast radiative recombination rates of quantum rod photoluminescence to probe temperature transients in semiconductor devices. We demonstrate a time resolution of 20 s on a single finger AlGaN/GaN HEMT. This technique provides an image of the surface temperature transients regardless of the device design/material system under test. The results were verified with transient thermo-reflectance measurements.

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intensiv 1|15 www.thieme.de/intensiv IntensI v pflege · frü hmobIlIsIeru ng 15 Foto: Bahar Öner Bewegung mit Beatmung Für Menschen, die länger im Krankenhaus sein müssen, ist Frühmobilisierung das A und O. Je schneller sie wieder auf die Beine kommen, desto besser unterstützen sie damit ihre eigene Gesundung. Das gilt prinzipiell auch für beatmete Patienten, wenn entsprechende Vorkehrungen getroffen werden. Welche das sind, wie sich ein Team aus Pflegenden und Therapeuten vorbereitet und wie ein betroffener Patient die Frühmobilisierung empfindet, schildert der folgende Beitrag. Bahar Öner, Carsten Hermes, Arnold Kaltwasser, Peter Nydahl, Danny Schuchhardt Heruntergeladen von: University of Arizona Library. Urheberrechtlich geschützt. intensiv 1|15 www.thieme.de/intensivIntensI v pflege · frü hmobIlIsIeru ng 16 E-