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- W2087202445 abstract "Thermal behavior of a multifinger AlGaN/GaN/sapphire HEMT with a metal airbridge connecting five source contacts is investigated in the transient state using optical and electrical methods and using a 2D thermal model. The gate layout consists of eight fingers, each having 50 μm width/0.3 μm length, the pitch is 35 μm and the thickness of the electroplated airbridge is 7 μm. The device drain contact was pulsed by 10 μs long 10 V pulses, corresponding to ∼11.9 W/mm dissipating power density. The electrical characterization method shows that at the end of the pulse the temperature increase in the HEMT channel is ∼185 K while the transient interferometric mapping (TIM) optical method indicates that the airbridge structure serves also as a cooler removing approximately 10% of the heat energy. Surface temperature maps are constructed by using the TIM for a time window of 2–6 μs. An asymmetry in the temperature profiles was observed, e.g. the source contact was colder by ∼25% than the drain contact at t = 6 μs." @default.
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- W2087202445 date "2007-06-01" @default.
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- W2087202445 title "Transient self-heating effects in multifinger AlGaN/GaN HEMTs with metal airbridges" @default.
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- W2087202445 doi "https://doi.org/10.1016/j.sse.2007.04.001" @default.
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