An Experimental Approach to Characterizing the Channel Local Temperature Induced by Self-Heating Effect in FinFET

E. Ray Hsieh, Meng Ru Jiang, Jian Li Lin, Steve S. Chung*, Tse Pu Chen, Shih An Huang, Tai Ju Chen, Osbert Cheng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Scopus citations


In this paper, we have developed a methodology of a lateral profiling technique of the channel local temperature in 14 nm FinFET, incurred by the self-heating effect (SHE). As SHE happens, the thermal source generated near the drain will dissipate toward the source side. Since the interaction between RTN trap and channel carriers is very sensitive to the temperature, the channel local temperature can be extracted through this interaction process between random-telegraph-noise (RTN) trap and carriers, and the position of the channel local temperature can be obtained from the RTN trap position. The results show that the highest temperature happens at the drain edge during SHE and pFinFET exhibits a much higher temperature than that of nFinFET. Furthermore, the distribution of channel local temperature can be described by the Fourier's law of thermal conduction. Averaged channel temperature can be used to extract the thermal resistance, Rth, which increases rapidly as the channel length is scaled down to 20 nm, further degrading the SHE, in terms of a significant short channel effect. We also found that the incremental channel resistance is proportional to the incremental channel local temperature, whose slope indicates the degree of SHE, and the slope of pFinFET is larger than that of nFinFET. Finally, SHE will cause 10% and 14% degradation of Id Vds for n-and pFinFET respectively. This can be reasonably explained by the decay of saturation velocity in high temperature. The results obtained based on this methodology will help us on the understanding of the SHE impact on a nano-scaled FinFET device.

Original languageEnglish
Article number8418834
Pages (from-to)866-874
Number of pages9
JournalIEEE Journal of the Electron Devices Society
StatePublished - 23 Jul 2018


  • FinFET
  • random telegraph noise
  • self-heating effect

Fingerprint Dive into the research topics of 'An Experimental Approach to Characterizing the Channel Local Temperature Induced by Self-Heating Effect in FinFET'. Together they form a unique fingerprint.

Cite this