Congratulations to Prof. Robert W. Dutton

The 2020 IEEE EDS Celebrated Member and Esteemed EDS Alumni

Dr. Dutton received his degrees from the University of California, Berkeley, and currently instructs electrical engineering at Stanford University. Current members of EDS take pride in the Celebrated Members' accomplishments, drawing from their achievements as inspiration to advance and achieve success in various fields. The award presentation will be held virtually during the 2020 IEDM in December [read more...]

ROBERT W. DUTTON

Robert W. Dutton received the B.S., M.S., and Ph.D. in Electrical Engineering degrees from the University of California, Berkeley, in 1966, 1967, and 1970, respectively. 

He is currently Robert and Barbara Kleist Professor of Electrical Engineering at Stanford University, and Associate Chair for Undergraduate Education. He has held summer staff positions at Fairchild, Bell Telephone Laboratories, Hewlett‐Packard, IBM Research, and Matsushita during 1967, 1973, 1975, 1977, and 1988 respectively. His research interests focus on integrated circuit process, device, and circuit technologies, especially the use of computer‐aided design (CAD) and parallel computational methods. He has published more than 200 journal articles and graduated more than four dozen doctorate students. 

Dr. Dutton was Editor of the IEEE Transactions on Computer Aided Design from 1984 to 1986, the winner of the 1987 IEEE J. J. Ebers Award, 1988 Guggenheim Fellowship to study in Japan, elected to the National Academy of Engineering in 1991, 1996 Jack A. Morton Award, 2000 C&C Prize Japan, University Researcher Award, Semiconductor Industry Association (2000), Phil Kaufman Award, Electronic Design Automation Consortium (2006), and 2014 Bass University Fellow in Undergraduate Education Program, Stanford University.

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FROM Oric1:
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[read more: ]

[paper] SPICE Compact Model for Schottky-Barrier FETs

Sheikh Aamir Ahsan, Member, IEEE, Shivendra Kumar Singh, Chandan Yadav, Member, IEEE, Enrique G. Marín, Member, IEEE, Alexander Kloes, Senior Member, IEEE

and Mike Schwarz, Senior Member, IEEE

A Comprehensive Physics-Based Current–Voltage SPICE Compact Model 

for 2-D-Material-Based Top-Contact Bottom-Gated Schottky-Barrier FETs

IEEE Transactions on Electron Devices, vol. 67, no. 11, pp. 5188-5195, Nov. 2020

DOI: 10.1109/TED.2020.3020900

Abstract: In this article, we report the development of a novel physics-based analytical model for explaining the current–voltage relationship in Schottky barrier (SB) 2D material field effect transistors (FETs). The model has at its core the calculation of the surface-potential (SP) which is accomplished by invoking 2-D density of states in conjunction with Fermi–Dirac (FD) distribution for electron and hole statistics. The explicit computation for the SP, carried out using the Lambert-W function together with Halley’s method, is used to construct the SP-based band-diagram for realizing the transparency of the SBs. Thereafter, the ambipolar current is derived in terms of the electron and hole injection phenomena the thermionic emission and Fowler–Nordheim tunneling mechanisms at the SB contacts. Furthermore, drift-diffusion current is derived in terms of the SP and incorporated in the model to account for the scattering in the intrinsic 2D channel. Finally, the Verilog-A model is validated against experimental IV data reported in the literature for two different 2D material systems. This is the first demonstration of an explicit SP-based SPICE model for ambipolar SB-2-D-FETs that is simultaneously built on tunneling-emission and driftdiffusion formalisms.

Fig: (a) Band-diagram sketched along positive y-direction underneath the source electrode. Blue and black lines represent bands before and after applying Vgs. (b) ψ-based diagram sketched along positive x, constructed after calculating ψs and ψd. The geometrical screening length λ is given by λ ≈ (tox t2D)^1/2.

Acknowledgement: This work was supported in part by the National Project Implementation Unit (NPIU) through the third phase of Technical Education Quality Improvement Programme (TEQIP-III) Project and in part by DST-SERB Startup Research Grant under Award SRG/2019/001122.

[paper] Process Induced Vt Variability

Mandar S. Bhoir, Member, IEEE, Thomas Chiarella, Jerome Mitard, Naoto Horiguchi, Member, IEEE, and Nihar Ranjan Mohapatra, Senior Member, IEEE

Vt Extraction Methodologies Influence Process Induced Vt Variability:

Does This Fact Still Hold for Advanced Technology Nodes? 

IEEE Transactions on Electron Devices, vol. 67, no. 11, pp. 4691-4695, Nov. 2020

DOI: 10.1109/TED.2020.3025750.

Abstract: In this work, we have investigated the influence of Vt extraction procedure on overall Vt variability of sub-10 nm Wfin FinFETs. Using six different Vt extraction techniques (These are 1) constant current (CC) technique, 2) extrapolation in linear regime [ELR, also known as maximum trans-conductance (gm)] technique, 3) trans-conductance extrapolation (TCE) technique, 4) second-derivative (SD) technique, 5) ratio method (RM); and 6) transition method (TM) [1]) we have experimentally demonstrated that the Vt variability is independent of Vt extraction procedure (unlike reported earlier). Furthermore, through systematic evaluation on commonly used Vt extraction techniques, the physics behind this anomalous behavior is investigated. It is shown that the significant variation in metal gate work-function and gate dielectric charges in advanced CMOS nodes is mainly responsible for this behavior. This claim is further validated for FinFETs with deeply scaled fin-width and effective oxide thickness (EOT).

Fig: (a) Schematic illustration of different process-variability sources in FinFET; 

(b)Transfer characteristics for FinFETs with similar Vt, CC but different RSD.

These FinFETs have different Vt, ELR because of RSD induced gm, max variations

Acknowleegement: This work was supported in part by the Visvesvaraya Ph.D. Scheme, MeitY, Government of India MEITY-PHD-250 and in part by the Horizon 2020 ASCENT EU Project (Access to European Nanoelectronics Network) under Project 654384.

References:
[1] A. Ortiz-Conde, F. G. Sánche, J. J. Liou, A. Cerdeira, M. Estrada, and Y. Yue, “A review of recent MOSFET threshold voltage extraction methods,” Microelectron. Rel., vol. 42, no. 4, pp. 583—596, 2002, doi: 10.1016/S0026-2714(02)00027-6

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Engineers at #PSU have demonstrated an #analog non-volatile #memory that can operate as a close mimic of the #synapse within the brain.https://t.co/fpykOONXAf#semi pic.twitter.com/eHbD4Uez0a

— Wladek Grabinski (@wladek60) November 2, 2020

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from Twitter https://twitter.com/wladek60

November 02, 2020 at 01:50PM
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