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Scheda Riassuntiva
Anno Accademico 2018/2019
Scuola Scuola di Ingegneria Industriale e dell'Informazione
Insegnamento 097516 - GRAPHENE AND NANOELECTRONIC DEVICES [I.C.]
  • 097513 - GRAPHENE NANOELECTRONICS AND NANOFABRICATION
Docente Sordan Roman
Cfu 5.00 Tipo insegnamento Modulo Di Corso Strutturato

Corso di Studi Codice Piano di Studio preventivamente approvato Da (compreso) A (escluso) Insegnamento
Ing Ind - Inf (Mag.)(ord. 270) - MI (486) ENGINEERING PHYSICS - INGEGNERIA FISICA*AZZZZ097606 - GRAPHENE NANOELECTRONICS
097516 - GRAPHENE AND NANOELECTRONIC DEVICES [I.C.]

Obiettivi dell'insegnamento

The course is focused on the extraordinary physical properties of graphene and their application in the development of graphene nanoelectronic devices. The main goal of the course is to provide a comprehensive understanding of the state-of-the-art graphene high-frequency electronics and realistically evaluate possible applications of graphene in modern electronics. The course also presents the state-of-the-art methods for the fabrication of the electronic devices at the nanoscale providing the comprehensive understanding of the fabrication methods used both in industry and research laboratories.


Risultati di apprendimento attesi

The student understands:

  • the main physical properties of graphene and how they can be exploited to realize graphene electronic devices;
  • how to extract important parameters and figures of merit of graphene field-effect transistors (GFETs) both in dc and at high-frequencies;
  • the advantages and disadvantages of GFETs with respect to conventional Si transistor technology;
  • the suitable applications of graphene in electronics;
  • the state-of-the-art technologies for the fabrication of devices at the nanoscale, both used in research and industry.

Argomenti trattati

Introduction to carbon-based material

  • Allotropes and  hybridization of carbon
  • Band spectrum and massless Dirac fermions in graphene
  • The origin of high charge carrier mobility in graphene
  • Comparison with carbon nanotubes
  • Klein paradox and half-integer quantum Hall effect

 

Graphene field effect transistors (FETs)

  • The importance of high mobility in electronic devices and circuits
  • Comparison between graphene and conventional FETs
  • Ambipolarity of graphene FETs
  • Electrostatic doping in graphene electronic circuits
  • The importance of drain current saturation and voltage gain
  • Impact of contact resistance on the properties of graphene FETs
  • Scaling and short-channel effects
  • Impact of band gap opening in graphene on FET properties

 

Small-signal model of graphene FETs

  • Low-frequency AC small signal model of FETs (hybrid-pi model)
  • Determination of transconductance gm and output conductance gd

 

Voltage and current gain

  • Definition of voltage and current gains
  • Intrinsic voltage gain gm/gd and intrinsic current gain h21

 

High-frequency model of graphene FETs

  • Extrinsic high-frequency model of FETs
  • Phasors in electronic circuits

 

Cutoff frequency fT of graphene FETs

  • Intrinsic and extrinsic cutoff frequency fT of graphene FETs
  • Comparison of graphene and conventional FETsin terms of fT
  • h and Y parameter models of two-port networks
  • Cutoff frequency from Y parameters

 

Power gain and maximum frequency of oscillation fmax of graphene FETs

  • Definition of power gain
  • Intrinsic and extrinsic maximum frequency of oscillation fmax of graphene FETs
  • Comparison of graphene and conventional FETsin terms of fmax
  • S parameters of two-port networks

 

Graphene electronic circuits

  • Graphene Moore’s law
  • Voltage gain and multi-stage circuits
  • Noise margin
  • Static and dynamic power dissipation
  • Graphene electronic circuits: amplifiers, mixers, frequency multipliers, logic gates
  • Realistic gate delays and graphene ring oscillators

 

Nanodevice Fabrication

  • Introduction to lithography
  • Deep ultraviolet lithography
  • Resolution enhancement technologies
  • Extreme ultraviolet lithography
  • Electron beam lithography
  • Alternative lithographic technologies
  • Pattern transfer
  • Nanofabrication of graphene nanoelectronic devices and circuits

Prerequisiti

The student will benefit from having already completed some courses in solid-state physics, for example Solid State Physics (096033) and Electronics (096032). However, this is not obligatory.


Modalità di valutazione

The student will be evaluated by written examination according to the calendar of the course.

The student will be expected to discuss the physical phenomena underlying applications of graphene in electronics, solve basic electronic circuits with graphene, extract transistor parameters and determine corresponding figures of merit.


Bibliografia

Forme didattiche
Tipo Forma Didattica Ore di attività svolte in aula
(hh:mm)
Ore di studio autonome
(hh:mm)
Lezione
32:30
48:45
Esercitazione
17:30
26:15
Laboratorio Informatico
0:00
0:00
Laboratorio Sperimentale
0:00
0:00
Laboratorio Di Progetto
0:00
0:00
Totale 50:00 75:00

Informazioni in lingua inglese a supporto dell'internazionalizzazione
Insegnamento erogato in lingua Inglese
Disponibilità di materiale didattico/slides in lingua inglese
Disponibilità di libri di testo/bibliografia in lingua inglese
Possibilità di sostenere l'esame in lingua inglese
Disponibilità di supporto didattico in lingua inglese
schedaincarico v. 1.6.5 / 1.6.5
Area Servizi ICT
19/01/2021