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- W4386876229 abstract "We demonstrate graded AlGaN/GaN heterojunction bipolar transistors (HBTs) with selective injection of minority carriers across a p-GaN base and patterned regrown base contacts. The selective injection design regulates minority carrier transport under emitter-base forward bias through a thin base region, while thick and highly doped p$^+$ GaN regrown layers patterned alongside the thin base regions are utilized to lower the base contact resistance. With SiO$_2$ employed as a spacer between the emitter and the p$^+$ regrown layers, the device with an interdigitated emitter/base-contact stripe design displayed a maximum collector current density (I$_C$) of 101 kA/cm$^2$, a maximum current gain ($beta$) of 70 at I$_C$ $sim$ 1 kA/cm$^2$ and $sim$ 11 for I$_C$ $>$ 50 kA/cm$^2$. The reported results demonstrate the potential of the selective injection approach to break the long-existing HBT design tradeoff between base resistance and current gain for next-generation radio frequency and mm-Wave applications." @default.
- W4386876229 created "2023-09-20" @default.
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- W4386876229 date "2023-09-18" @default.
- W4386876229 modified "2023-09-27" @default.
- W4386876229 title "Selective injection AlGaN/GaN heterojunction bipolar transistors with patterned regrown base contacts" @default.
- W4386876229 doi "https://doi.org/10.48550/arxiv.2309.09886" @default.
- W4386876229 hasPublicationYear "2023" @default.
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