ECE 875: Electronic Devices Prof. Virginia Ayres Electrical & Computer Engineering Michigan State University

VM Ayres, ECE875, S14 Lecture 01, 08 Jan 14 Course introduction Chapter 01

VM Ayres, ECE875, S14 Course:ECE 875 Physical Electronics Time:Monday, Wednesday, Friday 11:30 a.m. - 12:20 p.m. Place:Room 202 Urban Planning and Landscape Architecture Bldg. Website:

VM Ayres, ECE875, S14 Course:ECE 875 Physical Electronics Time:Monday, Wednesday, Friday 11:30 a.m. - 12:20 p.m. Place:Room 202 Urban Planning and Landscape Architecture Bldg. Website: In case we miss class due to travel: Alternative time: will try to reserve: Tuesday OR Thursday 11:40 a - 12:30 p

VM Ayres, ECE875, S14 Instructor:Professor Virginia Ayres ( Research areas: Nanoelectronics, Nanobio Telephone: Office:C-104, Engineering Research Complex Office Hours:Evenings 2 days before homework is due, 6:00-9:00 pm in Engineering Library

VM Ayres, ECE875, S14 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

VM Ayres, ECE875, S14 Grading: Midterm (take-home)150 pts. Final (take-home)150 pts. Homework:50 pts Total350 pts Midterm date: TBD (spring break: March 2014) Final due date: Friday, 02 May 14, to ECE Office (Ayres' mailbox) by 12:00 pm

VM Ayres, ECE875, S14 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)

VM Ayres, ECE875, S14 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

VM Ayres, ECE875, S14 ECE476 ECE875 Spring 2013

VM Ayres, ECE875, S14

QM operation Microwave source Microwave oscillator Switches & amplifiers

VM Ayres, ECE875, S14 Lecture 01, 08 Jan 14 Course introduction

VM Ayres, ECE875, S14 Electronics: Transport: e-’s moving in an environment Correct e- wave function in a crystal environment: Block function:  (R) = exp ik.a  (R) =  (R + a) Correct E-k energy levels versus direction of the environment: minimum = E gap Correct concentrations of carriers n and p Correct current and current density J: moving carriers I-V measurement J: V ext direction versus internal E-k: E gap direction Fixed e-’s and holes: C-V measurement Crystal Structures: Motivation: x Probability f 0 that energy level is occupied q n, p velocity Area (KE + PE)  = E 

VM Ayres, ECE875, S14 Unit cells: Non-cubic Easy but important aspect is shown in this Figure: Two different type of bonds

VM Ayres, ECE875, S14 These examples are all metals: Po, Na, W, Al, Au, etc. What a metallic bond looks like: Picture and Animation: So metals are good examples to show basic atomic arrangements.

VM Ayres, ECE875, S14 (1) Atomic arrangements are shown (2) Covalent bonds are shown These examples are semiconductors: Si. Ge, C, GaAs, GaP, etc.

VM Ayres, ECE875, S14 Unit cells: Non-cubic 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

VM Ayres, ECE875, S14 fcc lattice, to match Pr. 03

VM Ayres, ECE875, S14

Go backwards: How many atoms did you need to consider to get this step right? Answer: 2 atoms

VM Ayres, ECE875, S14 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.

VM Ayres, ECE875, S14 Crystal Structures: Motivation: Electronics: Transport: e-’s moving in an environment Correct e- wave function in a crystal environment: Block function:  (R) = exp ik.a  (R) =  (R + a) Periodicity of the environment: Need specify where the atoms are Unit cell a 3 for cubic systems sc, fcc, bcc, etc. OR Primitive cell for sc, fcc, bcc, etc. OR Atomic basis Most atoms Fewer atoms Least atoms Think about: need to specify: