Theory and Technology of Semiconductor Fabrication

Graduate course

Course information

Textbooks

Course materials

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Week Topic Lecture Interactive widgets Virtual lab
1 Introduction: materials, devices and the basic fabrication steps Lecture slides Semiconductor milestones
Technology trends and scaling
Basic planar process steps
2 Crystal growth I: from sand to a Czochralski ingot Lecture slides From sand to polished wafer
Czochralski crystal puller
Effective segregation coefficient
Lab 1: Crystal growth and four-point probe
3 Crystal growth II: float zone, GaAs, wafers and defects Lecture slides Float-zone refining
Four-point probe
Wafer flats and identification
Crystal defects gallery
4 Silicon oxidation Lecture slides Deal–Grove thermal oxidation
Oxide thickness by colour
Impurity redistribution during oxidation
Lab 2: Thermal oxidation (Deal–Grove)
5 Optical lithography Lecture slides Clean-room classes and killer particles
Exposure tools: contact, proximity, projection
Resolution vs depth of focus
Photoresist contrast curve
Aerial image → resist profile simulator
6 Next-generation lithography and simulation Lecture slides E-beam proximity effect
Aerial image → resist profile simulator
Resolution vs depth of focus
Lab 3: Photolithography process window
7 Etching Lecture slides Etch profile explorer
Orientation-dependent (anisotropic) Si etch
Reactive-ion etching (RIE) simulator
8 Diffusion I: theory and profiles Lecture slides Atomic diffusion mechanisms
Diffusivity vs temperature
Diffusion profile designer
Lab 4: Wet and dry etching
9 Diffusion II: extrinsic and lateral diffusion; process simulation Lecture slides Diffusion profile designer
10 Ion implantation I: range, stopping and channeling Lecture slides Ion implantation profile designer
Nuclear vs electronic stopping
Ion channeling in a crystal
Lab 5: Diffusion: pre-deposition and drive-in
11 Ion implantation II: damage, annealing and related processes Lecture slides Ion implantation profile designer
Ion channeling in a crystal
12 Film deposition I: epitaxial growth Lecture slides CVD / epitaxy growth-rate regimes
MBE: effusion cells and shutter-controlled layers
Lattice mismatch and critical thickness
Lab 6: Ion implantation and annealing
13 Film deposition II: dielectrics, polysilicon and metallisation Lecture slides Step coverage and void formation (Monte Carlo)
Gate leakage: SiO₂ vs high-k
14 Process integration I: passives, bipolar, MOSFET, CMOS Lecture slides NMOS process flow (4 masks)
CMOS process flow (p-well)
Bipolar (n-p-n) process flow
MOSFET threshold voltage and I–V
Lab 7: CVD, epitaxy and step coverage
15 Process integration II and IC manufacturing Lecture slides MEMS surface micromachining
Wafer map and yield models
Statistical process control
16 Future trends, project presentations and course review Lecture slides Gate leakage: SiO₂ vs high-k
Technology trends and scaling
Lab 8: Process integration and yield (capstone)


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Syllabus

  1. Introduction (Chapter 1): materials, devices and the basic fabrication steps

  2. Crystal growth (Chapter 2): Czochralski and float-zone growth, segregation, wafers and defects

  3. Silicon oxidation (Chapter 3): the Deal-Grove model

  4. Photolithography (Chapter 4): optical and next-generation lithography

  5. Etching (Chapter 5): wet etching, plasma and reactive-ion etching

  6. Diffusion (Chapter 6): Fick's laws, profiles, extrinsic and lateral diffusion

  7. Ion implantation (Chapter 7): range, stopping, channeling, damage and annealing

  8. Film deposition (Chapter 8): epitaxy, CVD, dielectrics, polysilicon and metallisation

  9. Process integration (Chapter 9): bipolar, MOS, CMOS, BiCMOS and MEMS

  10. IC manufacturing and yield (Chapter 10) and future trends (Chapter 11)

Grading

Component Weight
Project 20%
Seminar 20%
Final exam 60%

Slides from earlier years (PDF)