Abstract
This paper presents the results of investigations on high-speed self-aligned Si/SiGe:C HBTs featuring a selective epitaxial growth of the collector. We detail the dc and ac characteristics of the devices and demonstrate the improvement of the control of doping profiles at the base/collector junction. State-of-the-art f T value of 350 GHz has been achieved, the f T BV CEO product being equal to 525 GHz. V.
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