For Full-Text PDF, please login, if you are a member of IEICE,|
or go to Pay Per View on menu list, if you are a nonmember of IEICE.
Simulation Study of Short-Channel Effect in MOSFET with Two-Dimensional Materials Channel
Naoki HARADA Shintaro SATO Naoki YOKOYAMA
IEICE TRANSACTIONS on Electronics
Publication Date: 2015/03/01
Online ISSN: 1745-1353
Type of Manuscript: BRIEF PAPER
Category: Semiconductor Materials and Devices
MOSFET, transition metal dichalcogenide, short-channel effects, device simulation, high-k dielectric,
Full Text: PDF(272.3KB)>>
The short-channel effect (SCE) in a MOSFET with an atomically thin MoS2 channel was studied using a TCAD simulator. We derived the surface potential roll-up, drain-induced barrier lowering (DIBL), threshold voltage, and subthreshold swing (SS) as indexes of the SCE and analyzed their dependency on the channel thickness (number of atomic layers) and channel length. The minimum scalable channel length for a one-atomic-layer-thick MoS2 MOSFET was determined from the threshold voltage roll-off to be 7.6 nm. The one-layer-thick device showed a small DIBL of 87 mV/V at a 20 nm gate length. By using high-k gate insulator, an SS lower than 70 mV/dec is achievable in sub-10-nm-scale devices.