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In this paper, we investigate the important device characteristics of block oxide (BO) MOSFETs (bMOS), which are the BO length (Lbo) and the height (Hbo). According to the simulation results, the variation of Lbo and Hbo strongly affects the device characteristics, such as the sub-threshold swing, threshold voltage, on-state drain current (Ion), and the off-state drain current (Ioff). This is because...
In this paper, we present a highly scaled bulk metal-oxide-semiconductor field-effect transistor with block oxide (BO) and source/drain (S/D)-tied structure that meets the International Technology Roadmap for Semiconductors requirements for high-performance devices. This new device requires only a simple BO fabrication process using SiGe-Si epitaxial growth with selective SiGe removal and requires...
We present a non-traditional CMOS inverter composed a junctionless (JL) NMOSFET and an N+-N--P transistor which with simple process and high integration density in this paper. In the non-traditional CMOS inverter the JL NMOSFET serves as driver and the N+-N--P transistor serves as load, respectively. Based on the measurement date of the N+-N--P transistor published, we draw the load line of the non-traditional...
In this paper, we propose a junctionless vertical MOSFET (JLVMOS) based on bulk-Si wafer. According to the numerical simulations, the proposed JLVMOS can get a steep subthreshold swing (S. Swing), reduced DIBL, and higher ION/IOFF ratio, in comparison to a junctionless planar SOI MOSFET. This is because the vertical double-gate (DG) structure truly helps reduce the short-channel effects (SCEs). More...
In this paper, a novel non-classical CMOS inverter with simple process and high integration density is proposed, which is composed of a junctionless NMOSFET and a gated N--N-N+ transistor for driver and load, respectively. Also, the gated N--N-N+ transistor performance is also investigated. Based on the numerical simulations, we find out that the carrier mobility of the gated N--N-N+ transistor is...
In this paper, we propose a source-tied vertical MOSFET (STVMOS) by using 3-D simulation. The characteristics of STVMOS are not only similar to the SOI vertical MOSFET (SOI-VMOS), but also have much better thermal reliability. According to TCAD simulation results, we have achieved 70 mV/decade S.S., 145 mV/V DIBL, and more than 109 ION/IOFF current ratio.
In this paper, we study the thermal characteristics of the bMPI-based 1T-DRAM cell. For a bMPI-FET, it can not only improve the thermal stability about 38% compared with the bPDSOI-FET due to the S/D-tied scheme, but also maintain the desired short-channel characteristics due to the block oxide structure.
In this work, a novel device called dual-channel body-tied (DCBT) MOSFET is proposed. According to numerical simulations, the DCBT MOSFET can reduce the lattice temperature about 51.6% in top and 53.8% in bottom channel, respectively, while maintain the desirable short-channel characteristics, compared with the conventional non-body-tied DC structure.
This paper presents a highly scalable π-shaped source/drain (π-S/D) quasi-silicon-on-insulator (SOI) MOSFET and summarizes its preliminary characteristics compared with the recessed S/D SOI MOSFET and international technology roadmap for semiconductors (ITRS) roadmap values. SiGe-Si epitaxial growth, Si and SiGe etching, growth of epitaxial Si, and selective SiGe removal are used to form the π-S/D...
An ultimate n-shaped source/drain (π-S/D) metal-oxide semiconductor (MOS) transistor is proposed in this paper. The method used to fabricate the proposed π-S/D transistor is based on both the classical and modern techniques (such as, Si-SiGe epitaxial growth, selective SiGe removal, etc.) that can be controllable and repeatable. Also, a new and simple process without the need of an additional mask...
In this paper, a novel device architecture, namely novel self-align double gate MOSFET with source/drain tie, is proposed and compared with the ITRS. According to the simulation results, our proposed transistor not only enhances the on/off current ratio, but also decreases the drain induced barrier lowering and subthreshold swing due to the double gate scheme structure.
In this paper, we examine the current-voltage (IV) and capacitance-voltage (CV) characteristics of self-aligned (SA), planar block oxide (BO) metal-oxide semiconductor field-effect transistors (MOSFETs) using technology computer-aided design (TCAD) tools. For the first time, a comparison of the different types of BO MOSFETs, such as fully depleted silicon-on-insulator (FDSOI) FET with BO (bFDSOI),...
In this paper, for the first time, a novel devise-architecture namely multi-source/drain SOI MOSFET is proposed and compared with a conventional SOI MOSFET. According to the simulation result, our proposed transistor not only maintains the desirable short channel behaviour, but also enhances the on/off current ratio due to the multi-source/drain scheme.
This paper investigates the device behaviours of a pseudo tri-gate ultra-thin-channel vertical MOSFET with source/drain tie. For comparison two transistors are designed. According to the 2D simulation, our proposed structure can effectively enhance the drain current and the thermal stability, mainly due to the ultrathin channel (Tsi = 10 nm). The fabricated device have very low subthreshold swing...
A non-classical device structure namely self-aligned quasi-silicon-on-insulator (SOI) metal-oxide semiconductor (MOS) field-effect transistor with pi-shaped semiconductor conductive layer (SA-piFET) is presented, seeking to improve the performance and upgrade the reliability of the SOI-based devices. Designed to equip with a SA single crystal silicon channel layer, plus a natural source/drain (S/D)...
This work aims to examine and analyze carefully the effects of block oxide length (LBO) in a 40 nm multi-substrate-contact field-effect transistor (MSCFET). In addition, the proposed structure is based on the self-aligned (SA) gate-to-body technique. In the MSCFET design the two key parameters are the length and the height of the block oxide which are so sensitive to the short-channel effects (SCEs)...
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