Advanced Ultra Low-Power Semiconductor Devices

Shubham Tayal, PhD, is an assistant professor in the Department of Electronics and Communication Engineering at SR University, Warangal, India. He has more than six years of academic and research experience and has published more than 30 research papers in various scholarly journals and conferences. He is on the editorial and reviewer panel of many journals and conferences, as well. He is the editor or coeditor of seven books and was a recipient of the Green ThinkerZ International Distinguished Young Researcher Award in 2020. Abhishek Kumar Upadhyay, PhD, is a research and development engineer at X-FAB GmbH Dresden, Germany. After obtaining his PhD in electrical engineering from the Indian Institute of Technology in 2019, he worked for one year as a postdoctoral fellow in the Model Group, Material to System Integration Laboratory, University of Bordeaux, France, and has worked in the industry since. He has authored several research articles. Shiromani Balmukund Rahi, PhD, is a faculty member at the Mahamaya College of Agriculture Engineering and Technology, Akabarpur, Uttar Pradesh, India and an associated senior research scholar of Department of Electrical Engineering(Semiconductor Device, modeling division), Indian Institute of Technology Kanpur. He has more than six years of academic and research experience and has published 25 journal articles, two proceedings, and 18 book chapters, and he has edited seven books for international publications. Young Suh Song is an assistant professor in the Department of Computer Science at the Korea Military Academy. He has authored or co-authored over 40 research papers in journals and conferences, and he has served as a technical committee member and guest speaker at various universities and conferences.

Preface xi

1 Subthreshold Transistors: Concept and Technology 1
Ball Mukund Mani Tripathi

1.1 Introduction 2

1.2 Major Sources of Leakage and Possible Methods of Prevention 2

1.3 Possibilities and Challenges 12

1.4 Conclusions 21

2 Introduction to Conventional MOSFET and Advanced Transistor TFET 29
M. Saravanan, K. Ramkumar, Eswaran Parthasarathy, J. Ajayan and S. Sreejith

2.1 Introduction 30

2.2 Device Structure 30

2.3 TFET Principle of Operation 31

2.4 Material Characterization 33

2.5 Characteristics of TFET 35

2.6 Comparison of OFF-State Characteristics 37

2.7 Phonon Scattering's Impact 39

2.8 ON-State Performance Comparison 40

2.9 Performance Analysis Based on Intrinsic Delay 40

2.10 Bandgap's Effect on Device Performance 41

2.11 MOSFET and TFET Scaling Behaviour 43

2.12 Surface Potential of an N-TFET and N-MOSFET 45

2.13 Professional Advantages of TFET over MOSFET 46

2.14 Conclusion 46

3 Operation Principle and Fabrication of TFET 51
Mekonnen Getnet Yirak and Rishu Chaujar

3.1 Introduction 52

3.2 Planar MOSFET's Limitations 54

3.3 Demand for Low Power Operation 55

3.4 TFET: Operation Principle of TFET 56

3.5 TFET: Recent Design Issues in TFET 63

3.6 TFET: Modeling and Application 65

3.7 TFET: Fabrication Perspective 68

3.8 TFET: Applications and Future of Low-Power Electronics 70

3.9 Expected Challenges in Replacing MOSFET with TFET 70

3.10 Conclusion 71

4 Mathematical Modeling of TFET and Its Future Applications: Ultra Low-Power SRAM Circuit and III-IV TFET 77
Nayana G H and P. Vimala

4.1 Introduction 78

4.2 Modeling Approaches 78

4.3 Structure 81

4.4 Applications of Tunnel Field-Effect Transistor 83

4.5 Road Ahead for Tunnel Field Effect Transistors 87

5 Analysis of Channel Doping Variation on Transfer Characteristics to High Frequency Performance of F-TFET 91
Prabhat Singh and Dharmendra Singh Yadav

5.1 Introduction 92

5.2 Simulated Device Structure and Parameters 93

5.3 DC Characteristics 93

5.4 Analysis of Analog/RF FOMs 98

5.5 Conclusion 101

6 Comparative Study of Gate Engineered TFETs and Optimization of Ferroelectric Heterogate TFET Structure 105
Susmitha Kothapalli, Zohmingliana and Brinda Bhowmick

6.1 Introduction 106

6.2 Study of Different TFET Structures 106

6.3 Proposed Structure 109

6.4 Results and Discussion 110

6.5 Conclusion 127

6.6 Future Scope 128

7 State of the Art Tunnel FETs for Low Power Memory Applications 131
Arun A. V., Sreelekshmi P. S. and Jobymol Jacob

7.1 Static Random Access Memory 131

7.2 Performance Parameters of SRAM Cell 134

7.3 TFET-Based SRAM Cell Design 135

7.4 Conclusion 159

8 Epitaxial Layer-Based Si/SiGe Hetero-Junction Line Tunnel FETs: A Physical Insight 165
Abhishek Acharya, Sourabh Panwar, Shobhit Srivastava and Shashidhara M.

8.1 Fundamental Limitation of CMOS: Tunnel FETs 165

8.2 Working Principle of Tunnel FET 168

8.3 Point and Line TFETs: Tunneling Direction 169

8.4 Perspective of Line TFETs 170

8.5 Analytical Models of Line TFETs 176

8.6 Line TFETs for Analog & Digital Circuits Design 178

8.7 Other Steep Slope Devices 179

8.8 Conclusion 181

9 Investigation of Thermal Performance on Conventional and Junctionless Nanosheet Field Effect Transistors 187
Sresta Valasa, Shubham Tayal and Laxman Raju Thoutam

9.1 Introduction 188

9.2 Device Simulation Details 190

9.3 Results and Discussion 192

9.4 Conclusion 201

10 Introduction to Newly Adopted NCFET and Ferroelectrics for Low-Power Application 207
Shelja Kaushal

10.1 Introduction 208

10.2 NCFET and Its Design Constraints 209

10.3 NCFET for Low-Power Applications 216

10.4 Summary 226

11 Application of Ferroelectrics: Monolithic-3D Inference Engine with IGZO Based Ferroelectric Thin Film Transistor Synapses 235
Sourav De, Maximilian Lederer, Yannick Raffel, David Lehninger, Sunanda Thunder, Michael P.M. Jank, Tarek Ali and Thomas Kämpfe

11.1 Introduction 236

11.2 Ferroelectricity in Hafnium Oxide 241x Contents

11.3 IGZO Based Ferroelectric Thin Film Transistor 245

11.4 Applications in Neural Networks 249

11.5 Conclusion 250

12 Radiation Effects and Their Impact on SRAM Design: A Comprehensive Survey with Contemporary Challenges 261
Y. Alekhya, Umakanta Nanda and Chandan Kumar Pandey

12.1 Introduction 261

12.2 Literature Survey 263

12.3 Impact of Radiation Effects on Sram Cells 266

12.4 Results and Discussion 267

12.5 Conclusion 274

13 Final Summary and Future of Advanced Ultra Low Power Metal Oxide Semiconductor Field Effect Transistors 279
Young Suh Song, Shiromani Balmukund Rahi, Shahnaz Kossar, Abhishek Kumar Upadhyay, Shubham Tayal, Chandan Kumar Pandey and Biswajit Jena

13.1 Introduction 280

13.2 Challenges in Future Ultra-Low Power Semiconductors 282

13.3 Conclusion 286

References 288

Index 293