Impact of self-heating and substrate effects on small-signal output conductance in UTBB SOI MOSFETs
(2012) Solid-State Electronics — Vol. 71, p. 93-100 (2012)
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- Abstract
- The frequency variation of the output conductance in ultra-thin body with ultra-thin BOX (UTBB) SOI MOSFETs without a ground plane is studied through measurements and two-dimensional simulations. Two effects causing the output conductance variation with frequency, namely self-heating and source-to-drain coupling through the substrate, are discussed and qualitatively compared. Notwithstanding the use of ultra-thin BOX, which allows for improved heat evacuation from the channel to the Si substrate underneath BOX, a self-heating-related transition clearly appears in the output conductance frequency response. Furthermore, the use of an ultra thin BOX results in an increase of the substrate-related output conductance variation in frequency. As a result, the change in output conductance of UTBB MOSFETs caused by the substrate effect appears to be comparable and even stronger than the change due to self-heating.
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Citations
Makovejev, S., Raskin, J.-P., Md Arshad, M. K., Flandre, D., Olsen, S., Andrieu, F., & Kilchytska, V. (2012). Impact of self-heating and substrate effects on small-signal output conductance in UTBB SOI MOSFETs. Solid-State Electronics, 71, 93-100. https://doi.org/10.1016/j.sse.2011.10.027 (Original work published 2012)