Characterization and Modeling of Silicon-on-Insulator Lateral Bipolar Junction Transistors at Liquid Helium Temperature
Abstract
Conventional silicon bipolars are not suitable for low-temperature operation due to the deterioration of current gain (). In this paper, we characterize lateral bipolar junction transistors (LBJTs) fabricated on silicon-on-insulator (SOI) wafers down to liquid helium temperature (4 K). The positive SOI substrate bias could greatly increase the collector current and have a negligible effect on the base current, which significantly alleviates degradation at low temperatures. We present a physical-based compact LBJT model for 4 K simulation, in which the collector current () consists of the tunneling current and the additional current component near the buried oxide (BOX)/silicon interface caused by the substrate modulation effect. This model is able to fit the Gummel characteristics of LBJTs very well and has promising applications in amplifier circuits simulation for silicon-based qubits signals.
Keywords
Cite
@article{arxiv.2309.09257,
title = {Characterization and Modeling of Silicon-on-Insulator Lateral Bipolar Junction Transistors at Liquid Helium Temperature},
author = {Yuanke Zhang and Yuefeng Chen and Yifang Zhang and Jun Xu and Chao Luo and Guoping Guo},
journal= {arXiv preprint arXiv:2309.09257},
year = {2023}
}