标题: Variable-Channel Junctionless Poly-Si FETs: Demonstration and Investigation With Different Body Doping Concentrations
作者: Lin, Jer-Yi
Tsai, Chan-Yi
Shen, Chiuan-Huei
Chung, Chun-Chih
Kumar, Malkundi Puttaveerappa Vijay
Chao, Tien-Sheng
电子物理学系
Department of Electrophysics
关键字: Variable channel (VC);nanosheet (NS);junctionless (JL);body doping;polycrystalline silicon
公开日期: 1-九月-2018
摘要: In this letter, tri-gate polycrystalline silicon variable-channel junctionless transistors (VC-JLTs), which consist of a counter-doped p-type body below an n(+) active device layer, are successfully demonstrated to show a better performance compared with conventional tri-gate nanosheet (NS) JLTs. Because the potential barrier between the n-channel and p-body in the VC-JLT can be controlled by the gate, the effective conduction channel behaves as a "variable" channel, in which the conduction thickness is thinner or thicker than the physical n(+) thickness for the OFF or ON state, respectively. Consequently, the VC-JLT can turn OFF more efficiently due to the enhanced volume depletion and turn ON with a smaller series resistance owing to the augmented conduction volume. In addition, for the first time, the impact of the body doping concentration is investigated and the performance sensitivities of VC-JLTs in terms of I-ON, V-T, S.S., and DIBL are discussed with respect to the dopant redistribution. Furthermore, the quality factor (I-ON/S.S.) of the VC-JLT is also benchmarked with recently published poly-Si JLTs, showing that the proposed VC-JLT exhibits good S.S. and a record I-ON , which makes it as a promising device for 3-D integrated nanoelectronics.
URI: http://dx.doi.org/10.1109/LED.2018.2858227
http://hdl.handle.net/11536/148066
ISSN: 0741-3106
DOI: 10.1109/LED.2018.2858227
期刊: IEEE ELECTRON DEVICE LETTERS
Volume: 39
起始页: 1326
结束页: 1329
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