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A novel design of SOI SiGe HBTs with a buried n+ thin layer and p- doping layer is proposed to improve the product of cutoff frequency and breakdown voltage, which is a vital Johnson's figure of merit (J-FOM) of the device. In this design, the n+ thin layer is used to increase the cutoff frequency and the p- doping layer is adopted to maintain a high breakdown voltage. Furthermore, the thickness of n+ thin layer is also studied to improve the J-FOM. As a result, for the novel SOI SiGe HBT, the J-FOM is increased from 351.5GHz-V to 482.3GHz-V, when compared with that of the traditional device. This design effectively develops the application of SOI SiGe HBTs in microwave power. © 2018 IEEE.
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年份: 2018
页码: 56-59
语种: 英文
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