The Impact of Strain and Layout Dependent Effects on High Frequency Performance and Low Frequency Noise in Nanoscale Devices

Jyh Chyurn Guo*, Chih Shiang Chang

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

SiC strained nMOSFETs with sub-35 nm gate length can realize superior fT above 400GHz attributed to more than 20% enhancement of the mobility and transconductance. This super-400 GHz fT makes SiC strained nMOS a premium device for mm-wave CMOS circuits design. However, the SiC nMOSFETs reveal a dramatic increase of flicker noise and random telegraph noise (RTN), which may cause worse phase noise and detrimental impact on CMOS oscillator stability. The complex RTN features abnormally long capture and emission time constants (τc and τe) and suggests new mechanism responsible for the anomalously slow trapping and detrapping, due to a significant increase of the relaxation energy from SiC strain. This critical trade-off between high frequency performance and low frequency noise should be considered seriously for an appropriate deployment of high mobility devices and optimization adapted to RF and analog circuits.

Original languageEnglish
Title of host publicationProceedings of 2023 IEEE 15th International Conference on ASIC, ASICON 2023
EditorsFan Ye, Ting-Ao Tang
PublisherIEEE Computer Society
ISBN (Electronic)9798350312980
DOIs
StatePublished - 2023
Event15th IEEE International Conference on ASIC, ASICON 2023 - Nanjing, China
Duration: 24 Oct 202327 Oct 2023

Publication series

NameProceedings of International Conference on ASIC
ISSN (Print)2162-7541
ISSN (Electronic)2162-755X

Conference

Conference15th IEEE International Conference on ASIC, ASICON 2023
Country/TerritoryChina
CityNanjing
Period24/10/2327/10/23

Keywords

  • SiC strain
  • capture
  • cut-off frequency
  • elastic tunneling
  • electron-phonon coupling
  • emission
  • flicker noise
  • mobility
  • phase noise
  • random telegraph noise

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