ECE 875: Electronic Devices

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ECE 875Electronic Devices

• Prof. Virginia Ayres
• Electrical Computer Engineering
• Michigan State University
• ayresv_at_msu.edu

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Lecture 01, 08 Jan 14
Course introduction Chapter 01
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Course ECE 875 Physical Electronics Time Monday
, Wednesday, Friday 1130 a.m. - 1220
p.m. Place Room 202 Urban Planning and Landscape
Architecture Bldg. Website http//www.egr.msu.edu
/classes/ece875/ayresv
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Course ECE 875 Physical Electronics Time Monday
, Wednesday, Friday 1130 a.m. - 1220
p.m. Place Room 202 Urban Planning and Landscape
Architecture Bldg. Website http//www.egr.msu.edu
/classes/ece875/ayresv In case we miss class due
to travel Alternative time will try to reserve
Tuesday OR Thursday 1140 a - 1230 p
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Instructor Professor Virginia Ayres
(http//www.egr.msu.edu/ebnl) Research areas
Nanoelectronics, Nanobio Telephone [phone]
Email ayresv_at_msu.edu, ayresv2162_at_aol.com Office
C-104, Engineering Research Complex Office
Hours Evenings 2 days before homework is due,
600-900 pm in Engineering Library
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• Prerequisites ECE 874 or equivalent
• Textbook Physics of Semiconductor Devices, Third
  Edition, S.M. Sze and K.K. Ng
• Motivation for textbook
• For nanoelectronics research, need to know Sze
  contents original papers
• Model needed for publication in high impact
  journals. Sze will help

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Grading Midterm (take-home) 150 pts. Final
(take-home) 150 pts. Homework 50
pts Total 350 pts Midterm date TBD (spring
break 03-07 March 2014) Final due date Friday,
02 May 14, to ECE Office (Ayres' mailbox) by
1200 pm
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Course Content Core Part I Semiconductor
Physics Chapter 01 Physics and Properties of
Semiconductors a Review Part II Device
Building Blocks Chapter 02 p-n Junctions Chapter
03 Metal-Semiconductor Contacts Chapter
04 Metal-Insulator-Semiconductor Capacitors
Part III Transistors Chapter 05 Bipolar
Transistors (if time allows) Chapter
06 MOSFETs Chapter 07 JFETs, MESFETs and
MODFETs (if time allows)
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Course Content Beyond core TBD Part I
Semiconductor Physics Chapter 01 Physics and
Properties of Semiconductors a Review Part II
Device Building Blocks Chapter 02 p-n
Junctions Chapter 03 Metal-Semiconductor
Contacts Chapter 04 Metal-Insulator-Semiconductor
Capacitors Part III Transistors Chapter
05 Bipolar Transistors Chapter
06 MOSFETs Chapter 07 JFETs, MESFETs and MODFETs
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ECE476
ECE875 Spring 2013
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QM operation
Microwave source
Microwave oscillator
Switches amplifiers
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Lecture 01, 08 Jan 14
Course introduction
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Crystal Structures Motivation
Electronics Transport e-s moving in an
environment Correct e- wave function in a
crystal environment Block function Y(R)
expik.a y(R) Y(R a) Correct E-k energy
levels versus direction of the environment
minimum Egap Correct concentrations of
carriers n and p Correct current and current
density J moving carriers I-V measurement J
Vext direction versus internal E-k Egap
direction Fixed e-s and holes C-V measurement
(KE PE) Y EY
x Probability f0 that energy level is occupied
q n, p velocity Area
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Unit cells
Easy but important aspect is shown in this
Figure Two different type of bonds
Non-cubic
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These examples are all metals Po, Na, W, Al, Au,
etc.
What a metallic bond looks like
So metals are good examples to show basic atomic
arrangements.
Picture and Animation http//www.kentchemistry.co
m/links/bonding/metallic.htm
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(1) Atomic arrangements are shown(2) Covalent
bonds are shown
These examples are semiconductors Si. Ge, C,
GaAs, GaP, etc.
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Unit cells
A Unit cell is a convenient but not minimal
volume that contains an atomic arrangement that
shows the important symmetries of the crystal
Why are Unit cells like these not good
enough? Compare Sze Pr. 01(a) versus Pr. 03
Non-cubic
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fcc lattice, to match Pr. 03
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Go backwards How many atoms did you need to
consider to get this step right? Answer 2 atoms
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Go backwards How many atoms did you need to
consider to get this step right? Answer all 14
atoms
This was a simple calculation. 14 atoms would be
a lot in a complicated calculation.
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Crystal Structures MotivationElectronics
Transport e-s moving in an environment
Correct e- wave function in a crystal
environment Block function Y(R) expik.a y(R)
Y(R a)
Periodicity of the environment Need specify
where the atoms are Unit cell a3 for cubic
systems sc, fcc, bcc, etc. OR Primitive cell for
sc, fcc, bcc, etc. OR Atomic basis
Think about need to specify
Most atoms
Fewer atoms
Least atoms