High-speed Si hetero-bipolar transistor with a SiC wide-gap emitter and an ultrathin heavily doped photoepitaxially grown base

Abstract
The authors describe the AC performance of a Si-heterojunction bipolar transistor using a SiC wide-gap emitter with a photoepitaxially grown heavily doped ultrathin base (SiC-EBT). A 30-GHz cutoff frequency and low base resistance were achieved, while retaining an acceptable current gain and preventing tunneling current. The DC characteristics of the SiC-EBT were good enough to use in high-performance LSIs.<>

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