Understanding the Carbon Impact on Si/SiGe:C HBT Base Current Mismatch
2007
In this paper, we have investigated the impact of the carbon concentration on bipolar transistor matching at medium current region. Original base current matching results, obtained from the characterization of two carbon concentration splits in a SiGe:C BiCMOS technology, are first discussed and well interpreted by a new base current mismatch physical model. Our assumptions are also confirmed by a matching characterization of bipolar transistors subjected to a hot carrier injection (HCI) stress.
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