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- W2914114286 abstract "GaN HEMTs have a great potential to be well suited for the forthcoming 5G communication infrastructures and other millimeter wave applications, where high-power and high-efficient devices are required. For GaN HEMT heterostructures used in high-frequency applications (> 8 GHz), semi-insulating (SI) SiC is the best choice of substrates, owning to its high thermal conductivity and high resistivity, and the maturity in large-wafer mass production (up to 150 mm). Nevertheless, the typical thickness of a GaN layer grown on SiC substrates has to be at least 1.5~2.0 µm to obtain a structural quality manufacturable for device fabrication, due to the large in-plane lattice mismatch with GaN (3.4%). As a result, the thick GaN layer must be doped with acceptor-like impurities like carbon or iron [1] during the epitaxial growth to increase the resistivity, preventing a parallel conduction in the device. However, these impurities introduce deep traps, which capture electrons during the RF operation, rendering a depletion of the channel electrons thus reducing the device current/power density." @default.
- W2914114286 created "2019-02-21" @default.
- W2914114286 date "2018-01-01" @default.
- W2914114286 modified "2023-09-26" @default.
- W2914114286 title "(Invited) A Revolutionary GaN-on-SiC Heteroepitaxy for High-Frequency Power Transistors" @default.
- W2914114286 doi "https://doi.org/10.1149/ma2018-02/38/1285" @default.
- W2914114286 hasPublicationYear "2018" @default.
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