C implants for improved SiGe bipolar yield

摘要

A method for improving the SiGe bipolar yield as well as fabricating a SiGe heterojunction bipolar transistor is provided. The inventive method includes ion-implanting carbon, C, into at one of the following regions of the device: the collector region (16), the sub-collector region (14), the extrinsic base regions (29), and the collector-base junction region (27). In a preferred embodiment each of the aforesaid regions include C implants.