Numerical Simulation of a Nanoscale DG N-MOSFET Using SILVACO Software
|
|
- Angelica Harper
- 5 years ago
- Views:
Transcription
1 Numerical Simulation of a Nanoscale DG N-MOSFET Using SILVACO Software Ahlam Guen Faculty of Technology Tlemcen University Tlemcen,Algeria guenahlam@yahoo.fr Benyounes Bouazza Faculty of Technology. Tlemcen University Tlemcen,Algeria bouaguen@yahoo.fr Abstract The regular decrease of transistors sizes which is close to the atomistic dimension leads today to nanometric devices. Double-Gate (DG) MOSFETs are considered to be one of the most promising candidates for nanoscale CMOS devises. DG MOSFET device might be the unique viable alternative to build nano MOSFETs when L g <50nm. It demonstrated a better control of the gate region with a reduction of short channel effects, a perfect electrostatic control and a superior scalability. However the design parameters strongly affect the structure current. This paper presents modeling and simulation of the electrical properties of a nanoscale DGFET n-channel MOSFET. Our contribution focuses on the study a DG n-mosfet parameters variation upon its electrical properties. Simulation results we obtained relating to the influence of some parameters variation, that having a direct impact on its drain current have been performed using SILVACO software [1]. Keywords-device scaling; double-gate MOSFET; SILVACO software ; device Simulation. I. INTRODUCTION Over the last 40 years, we have been witness of a gigantic increase in the semiconductor and consumer electronics industry. With an unrestrained race towards the miniaturization MOSFET size does not cease decreasing involving not only the reduction in the geometrical parameters of the devices such as the channel length, the gate oxide thickness... but also the electric parameters such as supply voltage. The minimum channel length which is a crucial dimension has been shrinking continuously and significantly since the MOSFET fabrication and will necessary continue this decreasing. The motivation behind this decrease has been a growing interest in high speed devices and in very large scale integrated circuits Today, in practice gate length in BULK MOSFETs are scaled to below 50 nm and gate lengths of experimental FETs [2] -[3] have approached currently 15 nm. With this continued scaling short channel effects SCE appears, this is the reason why improvements to MOSFETs transistors have been made in order to reduce these harmful effects. In order to maintain gate control, with an accurate threshold voltage V TH, the gate oxide thickness t ox reduction must imperatively scale with the channel length scaling. The aptitude to control drain current I D with gate voltage V G in conventional transistors could be maintained if channel length L ch, oxide thickness t ox and depletion layer depths are reduced in harmony. The most serious concern in this shrinking is Short Channel Effects (SCE) that motivates further investigations of new MOS structures that might lead to possible integration of transistors with channel lengths in the manometer range. For gate lengths down to 40nm MOSFETs performances are deteriorated due to Short Channel Effects (SCE).This means that the shrinking process will come to an end if no new technology can be found [4]. That is how double gate MOSFETS are nowadays considered to be the promising candidate for nanoscale CMOS devices Compared with conventional single gate metal oxide semiconducteur fieldeffect transistor (MOSFETs) [5]-[6]. These structures with two gates and a thin body demonstrate better control of the gate region and consequently suppression of short channel effects. DC analysis of DG devices has revealed that the drain current and transconductance of a DG MOSFET are higher than twice the drain current and transconductance, respectively,of a Single gate SOI MOSFET [7,8.9], due to volume inversion phenomena. In order to highlight the qualities and also the defects of DG MOSFETs, we propose in this work to present, simulation results we obtained using SILVACO software for a double gate n-channel MOSFET with static biased. II. SIMULATED DEVICE In this work we consider an ideal DG MOSFET viewed as a perfectly symmetrical device where the two channels facing each-other are activated simultaneously and feature identical charge and mobility. A Schematic diagram of Double Gate MOSFET is given in Fig. 1. And a Double gate MOSFET under Scanning Electron Microscopy is shown in Fig 2. 40
2 Where Jn and Jp, are current densities (A/cm 2 ) ; R and G are recombination and generation rate (cm -3 s -1 ). The transport equations used to express electrons and holes current densities due to drift and diffusion are given by (4) and (5). Figure 1. A Schematic diagram of Double Gate MOSFET [3] q is the elementary charge (As); ε is the semiconductor permittivity (As/Vm); p and n are hole and electron density (cm -3 ); are correspondingly ionized donor and acceptor density concentration (cm -3 ), D n and D p are diffusion coefficients (cm 2 s -1 ), µ n and µ p are respectively electrons and holes motilities (cm 2 /Vs). In this work, ATLAS (SILVACO) is used to simulate the electric properties of a 2 dimensional designed DGFET Standard structure represented in Fig.3. Within the calculator, the fundamental equations are based on the conventional drift-diffusion model of charge transport with Fermi-Dirac statistics. The equations Solutions are achieved by Gummel algorithm. All the models used (models for low field mobility, model for velocity saturation) are implemented in ATLAS SILVACO. Figure 2. DG MOSFET structure under Scanning Electron Microscopy [5]. The double gate MOSFET consists of a conducting channel surrounded by gate electrodes on either side. This guarantees that no part of the channel is far away from the gates electrode. In Double gate MOSFETs, gate voltage controls the electric field determining the amount of current flow through the channel. The most common mode of operation is to switch both gates concurrently. The standard model for universal devices simulations is the semi-classical transport simulation of electrons and holes based on the drift diffusion approximation called DD model. The conduction in this model is governed by Poisson's equation (1) which couples the electrostatic potential V to the charge density and carriers continuity equations (index n for electrons and index p for holes). Poisson equation (1) and carrier s continuity equations (2) and (3) are given by [1],[10],[11]: III. NUMERICAL ANALYSIS Figure3. A standard Symmetrical DG-MOSFET. Numerical simulation is a powerful tool in semiconductor industry because it can analyze and predict the behavior of new devices, without the elevated cost required to manufacture the real components. The TCAD, if appropriately used, has the potential to reduce development costs by as much as 40% [12]. The starting point for our simulations is a basic structure represented in Fig.4. The different parameters of our structure are assumed as follows:. 41 Figure 4.Symmetrical DG-MOSFET considered in this work.
3 Drain and source length L GS =L GD =3nm; silicon film thickness t si =3nm; channel length L ch =24nm; gate length L ch =24nm; channel doping N A =10 18 /cm 3 ; source/drain doping N D =10 20 /cm 3. The simulated output and transfer characteristics are plotted in Fig.5 and Fig. 6. A. Influence of t ox variation on I D current Scaling oxide thickness is desirable for better drain current. Consequently it is practical to consider the impact of t ox thickness on the device performance. Figs. 7 and 8 exhibit the output and the transfer characteristics at different gate lengths for our symmetrical DG n-mosfet. Figure 5. Simulated output characteristic I DS V DS of the DG n-mosfet structure Figure 7. Output characteristics for a DG n-mosfet at different oxide thickness irst, confirm that you have the correct template for your In order to study the influence of our structure Figure 6. Simulated transfer characteristic I parameters on its electrical characteristics, some DS V GS of the DG n-mosfet structure. parameters are modified. We examine then the effect of these variations on the considered structure drain current. V. INFLUENCE OF PARAMETERS VARIATION ON THE DRAIN CURRENT. In order to study the influence of our structure parameters on its electrical characteristics, some parameters are modified. We examine then the effect of these variations on the considered structure drain current. Figure 8. Transfer characteristics for a DG n-mosfet at different oxide thickness. Figs.7 and 8, allow observing the influence of the technological parameter t OX on the drain current and on the threshold voltage. Indeed, a significant gate thickness might isolate the gate. At thinner oxide thickness, the drain saturation current increases strongly. 42
4 Thinner gate oxides thickness leads to product higher drain currents and transconductances, and a better pinchoff behavior. Consequently it is suggested to apply the lowest possible oxide thickness in order to achieve a better drain current. We can also validate that oxide thickness has a direct impact on threshold voltage which increases when t ox increases. By reducing oxide thickness from 2 nm to 1 nm, it is possible to improve short channel performances significantly. Moreover, gate oxide thickness values lower than a critical value lead to serious tunneling leakage levels, which presents a severe limitation on further scaling, if SiO 2 is to be chosen as gate oxide. The solution to this issue right now mostly investigated in Silicon MOSFET technology is the substitution of SiO 2 with alternative high-k oxide, such as HfO 2, which can yield an equivalent oxide thickness lower than 1 nm, still keeping tunneling leakage low with a larger physical thickness. B. Influence of gate length variation on I D current This section deals with the study of gate length variation effect on the electrical device characteristics. In order to achieve this task, the channel length transistor was held constant; however the gate length covers part or the entire channel. The influence of gate length variation effects on drain current was studied by holding the channel length constant and equal to 24nm. Figs 9 and 10 illustrate the output and the transfer characteristics at different gate lengths for a DG n- MOSFET. Figure 10. Transfer characteristics for a DG n-mosfet for different gate lengts.. When the gate length increases, the saturation drain current decreases strongly.at shorter gate lengths a threshold voltage roll off can be observed. Gate length reduction may lead to a bad DIBL characteristic; and this will be an important issue for scaling down MOSFET devices from the fabrication engineering opinion, for scaling down MOSFET devices. Without considering the poor SCEs for short channel devices, it could be concluded that the gate length does not drastically modulate the onstate current of double-gate devices which will be limited because of the relatively high parasitic resistance resulting on the limitation of the on-state current devices. We can also note that gate length must be chosen judiciously because the gate loss its control on the channel when the gate length is less significant than channel length. Therefore it is important not to reduce the gate length randomly. C. Influence o f t si thickness variation on I D current It is useful to consider the impact of silicon thickness on the device current and performances.figs 11 and 12 show the output and the transfer characteristics for different silicon film thickness t si. Figure9. Output characteristics for a DG n-mosfet for different gate lengths. Figure 11: Transfer characteristics at different silicon film thickness t si. 43
5 Figure 12: Transfer characteristics at different silicon film thickness t si. We can observe that thicker channels lead to larger drain currents, and also to a displacement of the threshold voltage toward smaller values. Those drawbacks are principally caused by the fact that the device with a thicker tsi weakens the controllability of the gate electrodes. Figure 14. Description of DIBL for silicon film thickness t si=9nm Figs 13 and 14 allow to notice that transfer curves with tsi=3 nm slightly shows DIBL effects, whereas these transfer curves with tsi= 9nm present significant DIBL effects. Moreover, the off-state current Ioff is much higher with the thicker tsi than the off-state current Ioff with a thinner tsi. Also the Ioff current of our n-dgfet device with the thicker silicon film tsi is significantly elevated compared with the thinner one. At the end we can conclude that, devices with a thicker tsi owing poor gate controllability have a lesser channel barrier height, present a higher leakage current level, and get a bad result for DIBL effects. VI. CONCLUSION The scaling down of conventional planar bulk MOSFETs according to the International Technology Roadmap for Semiconductors requires new structures such Double Gate MOSFETs. These new structures allow reducing short channel effects that appears under 50nm node. In order to conceive these new structures numerical devices simulations are required. Variations of different structure parameters have been carried out to calculate their influence on the device characteristics. In this work Variations of the different DGFET structure parameters have been carried out to calculate the influence of these variations on the device characteristics. Figure 13. Description of DIBL for silicon film thickness t si=3nm. At the end of this paper, we observe that simulation results we obtained are comparable to the results encountered in theory and are thus considered very promising and satisfactory. 44
6 REFERENCE [1] SILVACO, ATLAS User s Manual, Ver. 4.0, June 1995 [2] B. Metzger, Radio priručnik za amatere i tehničare, Tehnička knjiga,beograd, 1983 [3] I.M. Kostić, Radiorehnički sklopovi i arhitekture, Pergamena,Podgorica, 1996 [4] S. Eminente, M. Alessandrini, and C. Fiegna Comparative analysis of the RF and noise performance of bulk and singlegate ultra-thin SOI MOSFETs by numerical simulation, Solid- State Electronics, vol. 48, no 4, pp , [5] Kavitha Ramasamy, Cristina Crespo, Double-Gate MOSFETS Portland State University ECE 515 Winter 2003 [6] M. Vinet, et al. Bonded planar double-metal-gate NMOS transistors down to 10nm, IEEE Transactions on Electron Devices, vol. 26, no. 5, pp , 2005 [7] S. Cristoloveanu, Silicon on Insulator Technologies anddevices: from present to future, Solid-State Electronics, vol. 43, pp , [8] F. Balestra, S. Cristoloveanu, M. Benachir, J. Brini, and T.Elewa, Double-gate silicon-on-insulator transistor with volumeinversion: A new device with greatly enhancedperformance,ieee Electron Device Lett., vol. 8, no.9, pp , 1987 [9] F. Allibert, T. Ernst, J. Pretet, N. Hefyene, C. Perret, A.Zaslavsky, S. Cristoloveanu, From SOI materials to innovative devices, Solid-State Electronics, vol. 45, no. 4, pp ,2001. [10] Selberherr, S.: Analysis and Simulation of Semiconductor Devices. Berlin, Germany, Springer-Verlag [11] A.Amara, O. Rozeau, Planar, Double-Gate Transistor From Technology to Circuit Springer. [12] The International Technology Roadmap for Semiconductors 45
MOSFET short channel effects
MOSFET short channel effects overview Five different short channel effects can be distinguished: velocity saturation drain induced barrier lowering (DIBL) impact ionization surface scattering hot electrons
More informationFin-Shaped Field Effect Transistor (FinFET) Min Ku Kim 03/07/2018
Fin-Shaped Field Effect Transistor (FinFET) Min Ku Kim 03/07/2018 ECE 658 Sp 2018 Semiconductor Materials and Device Characterizations OUTLINE Background FinFET Future Roadmap Keeping up w/ Moore s Law
More informationDesign and Analysis of Double Gate MOSFET Devices using High-k Dielectric
International Journal of Electrical Engineering. ISSN 0974-2158 Volume 7, Number 1 (2014), pp. 53-60 International Research Publication House http://www.irphouse.com Design and Analysis of Double Gate
More informationSession 10: Solid State Physics MOSFET
Session 10: Solid State Physics MOSFET 1 Outline A B C D E F G H I J 2 MOSCap MOSFET Metal-Oxide-Semiconductor Field-Effect Transistor: Al (metal) SiO2 (oxide) High k ~0.1 ~5 A SiO2 A n+ n+ p-type Si (bulk)
More informationFuture MOSFET Devices using high-k (TiO 2 ) dielectric
Future MOSFET Devices using high-k (TiO 2 ) dielectric Prerna Guru Jambheshwar University, G.J.U.S. & T., Hisar, Haryana, India, prernaa.29@gmail.com Abstract: In this paper, an 80nm NMOS with high-k (TiO
More informationThree Terminal Devices
Three Terminal Devices - field effect transistor (FET) - bipolar junction transistor (BJT) - foundation on which modern electronics is built - active devices - devices described completely by considering
More informationSolid State Devices- Part- II. Module- IV
Solid State Devices- Part- II Module- IV MOS Capacitor Two terminal MOS device MOS = Metal- Oxide- Semiconductor MOS capacitor - the heart of the MOSFET The MOS capacitor is used to induce charge at the
More informationAnalytical Model for Surface Potential and Inversion Charge of Dual Material Double Gate Son MOSFET
International Journal of Engineering and Technical Research (IJETR) Analytical Model for Surface Potential and Inversion Charge of Dual Material Double Gate Son MOSFET Gaurabh Yadav, Mr. Vaibhav Purwar
More information2014, IJARCSSE All Rights Reserved Page 1352
Volume 4, Issue 3, March 2014 ISSN: 2277 128X International Journal of Advanced Research in Computer Science and Software Engineering Research Paper Available online at: www.ijarcsse.com Double Gate N-MOSFET
More informationDesign of 45 nm Fully Depleted Double Gate SOI MOSFET
Design of 45 nm Fully Depleted Double Gate SOI MOSFET 1. Mini Bhartia, 2. Shrutika. Satyanarayana, 3. Arun Kumar Chatterjee 1,2,3. Thapar University, Patiala Abstract Advanced MOSFETS such as Fully Depleted
More informationDesign & Performance Analysis of DG-MOSFET for Reduction of Short Channel Effect over Bulk MOSFET at 20nm
RESEARCH ARTICLE OPEN ACCESS Design & Performance Analysis of DG- for Reduction of Short Channel Effect over Bulk at 20nm Ankita Wagadre*, Shashank Mane** *(Research scholar, Department of Electronics
More informationCHAPTER 3 TWO DIMENSIONAL ANALYTICAL MODELING FOR THRESHOLD VOLTAGE
49 CHAPTER 3 TWO DIMENSIONAL ANALYTICAL MODELING FOR THRESHOLD VOLTAGE 3.1 INTRODUCTION A qualitative notion of threshold voltage V th is the gate-source voltage at which an inversion channel forms, which
More informationANALYTICAL MODELING AND CHARACTERIZATION OF CYLINDRICAL GATE ALL AROUND MOSFET
ANALYTICAL MODELING AND CHARACTERIZATION OF CYLINDRICAL GATE ALL AROUND MOSFET Shailly Garg 1, Prashant Mani Yadav 2 1 Student, SRM University 2 Assistant Professor, Department of Electronics and Communication,
More informationAtomic-layer deposition of ultrathin gate dielectrics and Si new functional devices
Atomic-layer deposition of ultrathin gate dielectrics and Si new functional devices Anri Nakajima Research Center for Nanodevices and Systems, Hiroshima University 1-4-2 Kagamiyama, Higashi-Hiroshima,
More informationSCALING AND NUMERICAL SIMULATION ANALYSIS OF 50nm MOSFET INCORPORATING DIELECTRIC POCKET (DP-MOSFET)
SCALING AND NUMERICAL SIMULATION ANALYSIS OF 50nm MOSFET INCORPORATING DIELECTRIC POCKET (DP-MOSFET) Zul Atfyi Fauzan M. N., Ismail Saad and Razali Ismail Faculty of Electrical Engineering, Universiti
More informationNAME: Last First Signature
UNIVERSITY OF CALIFORNIA, BERKELEY College of Engineering Department of Electrical Engineering and Computer Sciences EE 130: IC Devices Spring 2003 FINAL EXAMINATION NAME: Last First Signature STUDENT
More informationAlternatives to standard MOSFETs. What problems are we really trying to solve?
Alternatives to standard MOSFETs A number of alternative FET schemes have been proposed, with an eye toward scaling up to the 10 nm node. Modifications to the standard MOSFET include: Silicon-in-insulator
More informationM. Jagadesh Kumar and G. Venkateshwar Reddy Department of Electrical Engineering, Indian Institute of Technology, Hauz Khas, New Delhi , India
M. Jagadesh Kumar and G. V. Reddy, "Diminished Short Channel Effects in Nanoscale Double- Gate Silicon-on-Insulator Metal Oxide Field Effect Transistors due to Induced Back-Gate Step Potential," Japanese
More informationPerformance investigations of novel dual-material gate (DMG) MOSFET with dielectric pockets (DP)
Science in China Series E: Technological Sciences 2009 SCIENCE IN CHINA PRESS www.scichina.com tech.scichina.com Performance investigations of novel dual-material gate (DMG) MOSFET with dielectric pockets
More informationSemiconductor Physics and Devices
Metal-Semiconductor and Semiconductor Heterojunctions The Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET) is one of two major types of transistors. The MOSFET is used in digital circuit, because
More informationPerformance Comparison of CMOS and Finfet Based Circuits At 45nm Technology Using SPICE
RESEARCH ARTICLE OPEN ACCESS Performance Comparison of CMOS and Finfet Based Circuits At 45nm Technology Using SPICE Mugdha Sathe*, Dr. Nisha Sarwade** *(Department of Electrical Engineering, VJTI, Mumbai-19)
More informationA new Hetero-material Stepped Gate (HSG) SOI LDMOS for RF Power Amplifier Applications
A new Hetero-material Stepped Gate (HSG) SOI LDMOS for RF Power Amplifier Applications Radhakrishnan Sithanandam and M. Jagadesh Kumar, Senior Member, IEEE Department of Electrical Engineering Indian Institute
More informationMOSFET & IC Basics - GATE Problems (Part - I)
MOSFET & IC Basics - GATE Problems (Part - I) 1. Channel current is reduced on application of a more positive voltage to the GATE of the depletion mode n channel MOSFET. (True/False) [GATE 1994: 1 Mark]
More informationA Novel Technique for Suppression of Corner Effect in Square Gate All Around Mosfet
Electrical and Electronic Engineering 01, (5): 336-341 DOI: 10.593/j.eee.01005.14 A Novel Technique for Suppression of Corner Effect in Square Gate All Around Mosfet Santanu Sharma *, Kabita Chaudhury
More informationDrive performance of an asymmetric MOSFET structure: the peak device
MEJ 499 Microelectronics Journal Microelectronics Journal 30 (1999) 229 233 Drive performance of an asymmetric MOSFET structure: the peak device M. Stockinger a, *, A. Wild b, S. Selberherr c a Institute
More information6. LDD Design Tradeoffs on Latch-Up and Degradation in SOI MOSFET
110 6. LDD Design Tradeoffs on Latch-Up and Degradation in SOI MOSFET An experimental study has been conducted on the design of fully depleted accumulation mode SOI (SIMOX) MOSFET with regard to hot carrier
More informationPerformance Evaluation of MISISFET- TCAD Simulation
Performance Evaluation of MISISFET- TCAD Simulation Tarun Chaudhary Gargi Khanna Rajeevan Chandel ABSTRACT A novel device n-misisfet with a dielectric stack instead of the single insulator of n-mosfet
More informationJournal of Electron Devices, Vol. 20, 2014, pp
Journal of Electron Devices, Vol. 20, 2014, pp. 1786-1791 JED [ISSN: 1682-3427 ] ANALYSIS OF GIDL AND IMPACT IONIZATION WRITING METHODS IN 100nm SOI Z-DRAM Bhuwan Chandra Joshi, S. Intekhab Amin and R.
More informationCharacterization of Variable Gate Oxide Thickness MOSFET with Non-Uniform Oxide Thicknesses for Sub-Threshold Leakage Current Reduction
2012 International Conference on Solid-State and Integrated Circuit (ICSIC 2012) IPCSIT vol. 32 (2012) (2012) IACSIT Press, Singapore Characterization of Variable Gate Oxide Thickness MOSFET with Non-Uniform
More informationReliability of deep submicron MOSFETs
Invited paper Reliability of deep submicron MOSFETs Francis Balestra Abstract In this work, a review of the reliability of n- and p-channel Si and SOI MOSFETs as a function of gate length and temperature
More informationMOS TRANSISTOR THEORY
MOS TRANSISTOR THEORY Introduction A MOS transistor is a majority-carrier device, in which the current in a conducting channel between the source and the drain is modulated by a voltage applied to the
More informationParameter Optimization Of GAA Nano Wire FET Using Taguchi Method
Parameter Optimization Of GAA Nano Wire FET Using Taguchi Method S.P. Venu Madhava Rao E.V.L.N Rangacharyulu K.Lal Kishore Professor, SNIST Professor, PSMCET Registrar, JNTUH Abstract As the process technology
More informationSession 3: Solid State Devices. Silicon on Insulator
Session 3: Solid State Devices Silicon on Insulator 1 Outline A B C D E F G H I J 2 Outline Ref: Taurand Ning 3 SOI Technology SOl materials: SIMOX, BESOl, and Smart Cut SIMOX : Synthesis by IMplanted
More informationDesign of Gate-All-Around Tunnel FET for RF Performance
Drain Current (µa/µm) International Journal of Computer Applications (97 8887) International Conference on Innovations In Intelligent Instrumentation, Optimization And Signal Processing ICIIIOSP-213 Design
More information3-D Modelling of the Novel Nanoscale Screen-Grid Field Effect Transistor (SGFET)
3-D Modelling of the Novel Nanoscale Screen-Grid Field Effect Transistor (SGFET) Pei W. Ding, Kristel Fobelets Department of Electrical Engineering, Imperial College London, U.K. J. E. Velazquez-Perez
More informationLecture-45. MOS Field-Effect-Transistors Threshold voltage
Lecture-45 MOS Field-Effect-Transistors 7.4. Threshold voltage In this section we summarize the calculation of the threshold voltage and discuss the dependence of the threshold voltage on the bias applied
More informationLecture 4. MOS transistor theory
Lecture 4 MOS transistor theory 1.7 Introduction: A MOS transistor is a majority-carrier device, in which the current in a conducting channel between the source and the drain is modulated by a voltage
More informationECE 340 Lecture 37 : Metal- Insulator-Semiconductor FET Class Outline:
ECE 340 Lecture 37 : Metal- Insulator-Semiconductor FET Class Outline: Metal-Semiconductor Junctions MOSFET Basic Operation MOS Capacitor Things you should know when you leave Key Questions What is the
More informationAbhinav Kranti, Rashmi, S Haldar 1 & R S Gupta
Indian Journal of Pure & Applied Physics Vol. 4, March 004, pp 11-0 Modelling of threshold voltage adjustment in fully depleted double gate (DG) SOI MOSFETs in volume inversion to quantify requirements
More informationCONTENTS. 2.2 Schrodinger's Wave Equation 31. PART I Semiconductor Material Properties. 2.3 Applications of Schrodinger's Wave Equation 34
CONTENTS Preface x Prologue Semiconductors and the Integrated Circuit xvii PART I Semiconductor Material Properties CHAPTER 1 The Crystal Structure of Solids 1 1.0 Preview 1 1.1 Semiconductor Materials
More information6.012 Microelectronic Devices and Circuits
Page 1 of 13 YOUR NAME Department of Electrical Engineering and Computer Science Massachusetts Institute of Technology 6.012 Microelectronic Devices and Circuits Final Eam Closed Book: Formula sheet provided;
More informationIMPROVED CURRENT MIRROR OUTPUT PERFORMANCE BY USING GRADED-CHANNEL SOI NMOSFETS
IMPROVED CURRENT MIRROR OUTPUT PERFORMANCE BY USING GRADED-CHANNEL SOI NMOSFETS Marcelo Antonio Pavanello *, João Antonio Martino and Denis Flandre 1 Laboratório de Sistemas Integráveis Escola Politécnica
More informationExperiment 3. 3 MOSFET Drain Current Modeling. 3.1 Summary. 3.2 Theory. ELEC 3908 Experiment 3 Student#:
Experiment 3 3 MOSFET Drain Current Modeling 3.1 Summary In this experiment I D vs. V DS and I D vs. V GS characteristics are measured for a silicon MOSFET, and are used to determine the parameters necessary
More informationECE520 VLSI Design. Lecture 2: Basic MOS Physics. Payman Zarkesh-Ha
ECE520 VLSI Design Lecture 2: Basic MOS Physics Payman Zarkesh-Ha Office: ECE Bldg. 230B Office hours: Wednesday 2:00-3:00PM or by appointment E-mail: pzarkesh@unm.edu Slide: 1 Review of Last Lecture Semiconductor
More informationOptimization of Threshold Voltage for 65nm PMOS Transistor using Silvaco TCAD Tools
IOSR Journal of Electrical and Electronics Engineering (IOSR-JEEE) e-issn: 2278-1676,p-ISSN: 2320-3331, Volume 6, Issue 1 (May. - Jun. 2013), PP 62-67 Optimization of Threshold Voltage for 65nm PMOS Transistor
More informationEECS130 Integrated Circuit Devices
EECS130 Integrated Circuit Devices Professor Ali Javey 11/01/2007 MOSFETs Lecture 5 Announcements HW7 set is due now HW8 is assigned, but will not be collected/graded. MOSFET Technology Scaling Technology
More informationInternational Journal of Scientific & Engineering Research, Volume 6, Issue 2, February-2015 ISSN
Performance Evaluation and Comparison of Ultra-thin Bulk (UTB), Partially Depleted and Fully Depleted SOI MOSFET using Silvaco TCAD Tool Seema Verma1, Pooja Srivastava2, Juhi Dave3, Mukta Jain4, Priya
More informationINTERNATIONAL JOURNAL OF APPLIED ENGINEERING RESEARCH, DINDIGUL Volume 1, No 3, 2010
Low Power CMOS Inverter design at different Technologies Vijay Kumar Sharma 1, Surender Soni 2 1 Department of Electronics & Communication, College of Engineering, Teerthanker Mahaveer University, Moradabad
More informationUnit III FET and its Applications. 2 Marks Questions and Answers
Unit III FET and its Applications 2 Marks Questions and Answers 1. Why do you call FET as field effect transistor? The name field effect is derived from the fact that the current is controlled by an electric
More informationECE 440 Lecture 39 : MOSFET-II
ECE 440 Lecture 39 : MOSFETII Class Outline: MOSFET Qualitative Effective Mobility MOSFET Quantitative Things you should know when you leave Key Questions How does a MOSFET work? Why does the channel mobility
More informationModeling & Analysis of Surface Potential and Threshold Voltage for Narrow channel 3D FDSOI MOSFET
Modeling & Analysis of Surface Potential and Threshold Voltage for Narrow channel 3D... 273 IJCTA, 9(22), 2016, pp. 273-278 International Science Press Modeling & Analysis of Surface Potential and Threshold
More informationSubstrate Bias Effects on Drain Induced Barrier Lowering (DIBL) in Short Channel NMOS FETs
Australian Journal of Basic and Applied Sciences, 3(3): 1640-1644, 2009 ISSN 1991-8178 Substrate Bias Effects on Drain Induced Barrier Lowering (DIBL) in Short Channel NMOS FETs 1 1 1 1 2 A. Ruangphanit,
More informationAn Analytical model of the Bulk-DTMOS transistor
Journal of Electron Devices, Vol. 8, 2010, pp. 329-338 JED [ISSN: 1682-3427 ] Journal of Electron Devices www.jeldev.org An Analytical model of the Bulk-DTMOS transistor Vandana Niranjan Indira Gandhi
More informationLecture - 18 Transistors
Electronic Materials, Devices and Fabrication Dr. S. Prarasuraman Department of Metallurgical and Materials Engineering Indian Institute of Technology, Madras Lecture - 18 Transistors Last couple of classes
More informationvalue of W max for the device. The at band voltage is -0.9 V. Problem 5: An Al-gate n-channel MOS capacitor has a doping of N a = cm ;3. The oxi
Prof. Jasprit Singh Fall 2001 EECS 320 Homework 10 This homework is due on December 6 Problem 1: An n-type In 0:53 Ga 0:47 As epitaxial layer doped at 10 16 cm ;3 is to be used as a channel in a FET. A
More informationproblem grade total
Fall 2005 6.012 Microelectronic Devices and Circuits Prof. J. A. del Alamo Name: Recitation: November 16, 2005 Quiz #2 problem grade 1 2 3 4 total General guidelines (please read carefully before starting):
More informationEE301 Electronics I , Fall
EE301 Electronics I 2018-2019, Fall 1. Introduction to Microelectronics (1 Week/3 Hrs.) Introduction, Historical Background, Basic Consepts 2. Rewiev of Semiconductors (1 Week/3 Hrs.) Semiconductor materials
More informationINTRODUCTION TO MOS TECHNOLOGY
INTRODUCTION TO MOS TECHNOLOGY 1. The MOS transistor The most basic element in the design of a large scale integrated circuit is the transistor. For the processes we will discuss, the type of transistor
More information4.1 Device Structure and Physical Operation
10/12/2004 4_1 Device Structure and Physical Operation blank.doc 1/2 4.1 Device Structure and Physical Operation Reading Assignment: pp. 235-248 Chapter 4 covers Field Effect Transistors ( ) Specifically,
More informationSRM INSTITUTE OF SCIENCE AND TECHNOLOGY (DEEMED UNIVERSITY)
SRM INSTITUTE OF SCIENCE AND TECHNOLOGY (DEEMED UNIVERSITY) QUESTION BANK I YEAR B.Tech (II Semester) ELECTRONIC DEVICES (COMMON FOR EC102, EE104, IC108, BM106) UNIT-I PART-A 1. What are intrinsic and
More informationHigh performance Hetero Gate Schottky Barrier MOSFET
High performance Hetero Gate Schottky Barrier MOSFET Faisal Bashir *1, Nusrat Parveen 2, M. Tariq Banday 3 1,3 Department of Electronics and Instrumentation, Technology University of Kashmir, Srinagar,
More informationSub-Threshold Region Behavior of Long Channel MOSFET
Sub-threshold Region - So far, we have discussed the MOSFET behavior in linear region and saturation region - Sub-threshold region is refer to region where Vt is less than Vt - Sub-threshold region reflects
More informationPERFORMANCE EVALUATION OF FD-SOI MOSFETS FOR DIFFERENT METAL GATE WORK FUNCTION
PERFORMANCE EVALUATION OF FD-SOI MOSFETS FOR DIFFERENT METAL GATE WORK FUNCTION Deepesh Ranka 1, Ashwani K. Rana 2, Rakesh Kumar Yadav 3, Kamalesh Yadav 4, Devendra Giri 5 # Department of Electronics and
More informationAnalog Performance of Scaled Bulk and SOI MOSFETs
Analog Performance of Scaled and SOI MOSFETs Sushant S. Suryagandh, Mayank Garg, M. Gupta, Jason C.S. Woo Department. of Electrical Engineering University of California, Los Angeles CA 99, USA. woo@icsl.ucla.edu
More informationI E I C since I B is very small
Figure 2: Symbols and nomenclature of a (a) npn and (b) pnp transistor. The BJT consists of three regions, emitter, base, and collector. The emitter and collector are usually of one type of doping, while
More informationLecture 33 - The Short Metal-Oxide-Semiconductor Field-Effect Transistor (cont.) April 30, 2007
6.720J/3.43J - Integrated Microelectronic Devices - Spring 2007 Lecture 33-1 Lecture 33 - The Short Metal-Oxide-Semiconductor Field-Effect Transistor (cont.) April 30, 2007 Contents: 1. MOSFET scaling
More information8. Characteristics of Field Effect Transistor (MOSFET)
1 8. Characteristics of Field Effect Transistor (MOSFET) 8.1. Objectives The purpose of this experiment is to measure input and output characteristics of n-channel and p- channel field effect transistors
More informationINTRODUCTION: Basic operating principle of a MOSFET:
INTRODUCTION: Along with the Junction Field Effect Transistor (JFET), there is another type of Field Effect Transistor available whose Gate input is electrically insulated from the main current carrying
More informationCHAPTER 2 LITERATURE REVIEW
CHAPTER 2 LITERATURE REVIEW 2.1 Introduction of MOSFET The structure of the MOS field-effect transistor (MOSFET) has two regions of doping opposite that of the substrate, one at each edge of the MOS structure
More informationSimulation of MOSFETs, BJTs and JFETs. At and Near the Pinch-off Region. Xuan Yang
Simulation of MOSFETs, BJTs and JFETs At and Near the Pinch-off Region by Xuan Yang A Thesis Presented in Partial Fulfillment of the Requirements for the Degree Master of Science Approved November 2011
More informationOrganic Electronics. Information: Information: 0331a/ 0442/
Organic Electronics (Course Number 300442 ) Spring 2006 Organic Field Effect Transistors Instructor: Dr. Dietmar Knipp Information: Information: http://www.faculty.iubremen.de/course/c30 http://www.faculty.iubremen.de/course/c30
More informationDrain. Drain. [Intel: bulk-si MOSFETs]
1 Introduction For more than 40 years, the evolution and growth of very-large-scale integration (VLSI) silicon-based integrated circuits (ICs) have followed from the continual shrinking, or scaling, of
More informationEECS130 Integrated Circuit Devices
EECS130 Integrated Circuit Devices Professor Ali Javey 11/6/2007 MOSFETs Lecture 6 BJTs- Lecture 1 Reading Assignment: Chapter 10 More Scalable Device Structures Vertical Scaling is important. For example,
More informationProf. Paolo Colantonio a.a
Prof. Paolo Colantonio a.a. 20 2 Field effect transistors (FETs) are probably the simplest form of transistor, widely used in both analogue and digital applications They are characterised by a very high
More informationSolid State Device Fundamentals
Solid State Device Fundamentals 4.4. Field Effect Transistor (MOSFET) ENS 463 Lecture Course by Alexander M. Zaitsev alexander.zaitsev@csi.cuny.edu Tel: 718 982 2812 4N101b 1 Field-effect transistor (FET)
More informationSemiconductor TCAD Tools
Device Design Consideration for Nanoscale MOSFET Using Semiconductor TCAD Tools Teoh Chin Hong and Razali Ismail Department of Microelectronics and Computer Engineering, Universiti Teknologi Malaysia,
More informationMOS Capacitance and Introduction to MOSFETs
ECE-305: Fall 2016 MOS Capacitance and Introduction to MOSFETs Professor Peter Bermel Electrical and Computer Engineering Purdue University, West Lafayette, IN USA pbermel@purdue.edu 11/4/2016 Pierret,
More information4H-SiC V-Groove Trench MOSFETs with the Buried p + Regions
ELECTRONICS 4H-SiC V-Groove Trench MOSFETs with the Buried p + Regions Yu SAITOH*, Toru HIYOSHI, Keiji WADA, Takeyoshi MASUDA, Takashi TSUNO and Yasuki MIKAMURA ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
More informationField-Effect Transistor (FET) is one of the two major transistors; FET derives its name from its working mechanism;
Chapter 3 Field-Effect Transistors (FETs) 3.1 Introduction Field-Effect Transistor (FET) is one of the two major transistors; FET derives its name from its working mechanism; The concept has been known
More informationChannel Engineering for Submicron N-Channel MOSFET Based on TCAD Simulation
Australian Journal of Basic and Applied Sciences, 2(3): 406-411, 2008 ISSN 1991-8178 Channel Engineering for Submicron N-Channel MOSFET Based on TCAD Simulation 1 2 3 R. Muanghlua, N. Vittayakorn and A.
More informationDesign & Simulation of Multi Gate Piezoelectric FET Devices for Sensing Applications
Design & Simulation of Multi Gate Piezoelectric FET Devices for Sensing Applications Sunita Malik 1, Manoj Kumar Duhan 2 Electronics & Communication Engineering Department, Deenbandhu Chhotu Ram University
More informationConduction Characteristics of MOS Transistors (for fixed Vds)! Topic 2. Basic MOS theory & SPICE simulation. MOS Transistor
Conduction Characteristics of MOS Transistors (for fixed Vds)! Topic 2 Basic MOS theory & SPICE simulation Peter Cheung Department of Electrical & Electronic Engineering Imperial College London (Weste&Harris,
More informationTopic 2. Basic MOS theory & SPICE simulation
Topic 2 Basic MOS theory & SPICE simulation Peter Cheung Department of Electrical & Electronic Engineering Imperial College London (Weste&Harris, Ch 2 & 5.1-5.3 Rabaey, Ch 3) URL: www.ee.ic.ac.uk/pcheung/
More informationConduction Characteristics of MOS Transistors (for fixed Vds) Topic 2. Basic MOS theory & SPICE simulation. MOS Transistor
Conduction Characteristics of MOS Transistors (for fixed Vds) Topic 2 Basic MOS theory & SPICE simulation Peter Cheung Department of Electrical & Electronic Engineering Imperial College London (Weste&Harris,
More informationMEASUREMENT AND INSTRUMENTATION STUDY NOTES UNIT-I
MEASUREMENT AND INSTRUMENTATION STUDY NOTES The MOSFET The MOSFET Metal Oxide FET UNIT-I As well as the Junction Field Effect Transistor (JFET), there is another type of Field Effect Transistor available
More informationDepletion-mode operation ( 공핍형 ): Using an input gate voltage to effectively decrease the channel size of an FET
Ch. 13 MOSFET Metal-Oxide-Semiconductor Field-Effect Transistor : I D D-mode E-mode V g The gate oxide is made of dielectric SiO 2 with e = 3.9 Depletion-mode operation ( 공핍형 ): Using an input gate voltage
More informationEFFECT OF STRUCTURAL AND DOPING PARAMETER VARIATIONS ON NQS DELAY, INTRINSIC GAIN AND NF IN JUNCTIONLESS FETS
EFFECT OF STRUCTURAL AND DOPING PARAMETER VARIATIONS ON NQS DELAY, INTRINSIC GAIN AND NF IN JUNCTIONLESS FETS B. Lakshmi 1 and R. Srinivasan 2 1 School of Electronics Engineering, VIT University, Chennai,
More informationDigital Integrated Circuits A Design Perspective. The Devices. Digital Integrated Circuits 2nd Devices
Digital Integrated Circuits A Design Perspective The Devices The Diode The diodes are rarely explicitly used in modern integrated circuits However, a MOS transistor contains at least two reverse biased
More informationSource/Drain Parasitic Resistance Role and Electric Coupling Effect in Sub 50 nm MOSFET Design
Source/Drain Parasitic Resistance Role and Electric Coupling Effect in Sub 50 nm MOSFET Design 9/25/2002 Jun Yuan, Peter M. Zeitzoff*, and Jason C.S. Woo Department of Electrical Engineering University
More informationMSE 410/ECE 340: Electrical Properties of Materials Fall 2016 Micron School of Materials Science and Engineering Boise State University
MSE 410/ECE 340: Electrical Properties of Materials Fall 2016 Micron School of Materials Science and Engineering Boise State University Practice Final Exam 1 Read the questions carefully Label all figures
More informationMTLE-6120: Advanced Electronic Properties of Materials. Semiconductor transistors for logic and memory. Reading: Kasap
MTLE-6120: Advanced Electronic Properties of Materials 1 Semiconductor transistors for logic and memory Reading: Kasap 6.6-6.8 Vacuum tube diodes 2 Thermionic emission from cathode Electrons collected
More informationTransistor was first invented by William.B.Shockley, Walter Brattain and John Bardeen of Bell Labratories. In 1961, first IC was introduced.
Unit 1 Basic MOS Technology Transistor was first invented by William.B.Shockley, Walter Brattain and John Bardeen of Bell Labratories. In 1961, first IC was introduced. Levels of Integration:- i) SSI:-
More informationDigital Electronics. By: FARHAD FARADJI, Ph.D. Assistant Professor, Electrical and Computer Engineering, K. N. Toosi University of Technology
K. N. Toosi University of Technology Chapter 7. Field-Effect Transistors By: FARHAD FARADJI, Ph.D. Assistant Professor, Electrical and Computer Engineering, K. N. Toosi University of Technology http://wp.kntu.ac.ir/faradji/digitalelectronics.htm
More informationMOSFET Parasitic Elements
MOSFET Parasitic Elements Three MITs of the ay Components of the source resistance and their influence on g m and R d Gate-induced drain leakage (GIL) and its effect on lowest possible leakage current
More informationIntroduction to MOSFET MOSFET (Metal Oxide Semiconductor Field Effect Transistor)
Microelectronic Circuits Introduction to MOSFET MOSFET (Metal Oxide Semiconductor Field Effect Transistor) Slide 1 MOSFET Construction MOSFET (Metal Oxide Semiconductor Field Effect Transistor) Slide 2
More informationTwo Dimensional Analytical Threshold Voltages Modeling for Short-Channel MOSFET
Two Dimensional Analytical Threshold Voltages Modeling for Short-Channel MOSFET Sanjeev kumar Singh, Vishal Moyal Electronics & Telecommunication, SSTC-SSGI, Bhilai, Chhatisgarh, India Abstract- The aim
More informationEffect of Channel Doping Concentration on the Impact ionization of n- Channel Fully Depleted SOI MOSFET
International Journal of Engineering Works Kambohwell Publisher Enterprises Vol. 2, Issue 2, PP. 18-22, Feb. 2015 www.kwpublisher.com Effect of Channel Doping Concentration on the Impact ionization of
More informationExam Below are two schematics of current sources implemented with MOSFETs. Which current source has the best compliance voltage?
Exam 2 Name: Score /90 Question 1 Short Takes 1 point each unless noted otherwise. 1. Below are two schematics of current sources implemented with MOSFETs. Which current source has the best compliance
More informationDesign and Performance Analysis of SOI and Conventional MOSFET based CMOS Inverter
I J E E E C International Journal of Electrical, Electronics ISSN No. (Online): 2277-2626 and Computer Engineering 3(2): 138-143(2014) Design and Performance Analysis of SOI and Conventional MOSFET based
More information1 Introduction to analog CMOS design
1 Introduction to analog CMOS design This chapter begins by explaining briefly why there is still a need for analog design and introduces its main tradeoffs. The need for accurate component modeling follows.
More information