Temperature-dependent stress in diamond-coated AlGaN/GaN heterostructures

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F16%3A00464052" target="_blank" >RIV/68378271:_____/16:00464052 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1016/j.matdes.2016.06.006" target="_blank" >http://dx.doi.org/10.1016/j.matdes.2016.06.006</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.matdes.2016.06.006" target="_blank" >10.1016/j.matdes.2016.06.006</a>

Result language
angličtina
Original language name
Temperature-dependent stress in diamond-coated AlGaN/GaN heterostructures
Original language description
In this study, we present a methodology for evaluation of thermally induced stress in diamond microstructures. The diamond strips (2 mm in width and 0.78 or 2.8 μm in thickness) were selectively grown on AlGaN/GaN heterostructures. The stress was evaluated from the Raman shift of the diamond peak position within the temperature range from 50 to 400°C. The shift was measured at two positions, i.e. at center and edge of the strip. We observed that for temperature increase from 50 to 400°C the difference between stresses evaluated at the center and edge of diamond strip (stress) decreases from 0.27 to 0.18 GPa and from 0.32 to 0.1 GPa for the thinner and thicker diamond films, respectively. Experimental data were compared with FEM simulations. The simulations fitted well to experimental data and confirmed that the stress difference between the center and edge of diamond strip was caused by thermal stress component.n
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
<a href="/en/project/GP14-16549P" target="_blank" >GP14-16549P: Electronic Performance Enhancement of Diamond-GaN Hybrid Structures Using Engineered Strains</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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