Class1_Slides

Class1_Slides - Physical Electronics EE.338 Steve Cronin...

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1 Steve Cronin University of Southern California Electrical Engineering - Electrophysics Physical Electronics EE.338 Book An introduction to semiconductor devices by Donald Neamen McGraw Hill
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2 Grading • Quizzes 15% • Homework Assignments 25% • Midterm Exam (best 2 of 3) 20% • Final Exam 20% 100% Quizzes • Test your conceptual understanding • Force you to review your notes before class • Avoid plug and chug… Miscellaneous • Website: http://blackboard.usc.edu – Assignments and classnotes downloaded – Syllabus (tentative) • TA: Mehmet Aykol – memoman.inc@gmail.com • Discussion Sections: – 10:00-10:50am Thursday GFS109 – 1:00-1:50pm Wednesday KAP166 • Office Hours – Thursday 11-1PM, PHE 624
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3 The Challenge of Teaching EE338 Materials Science - crystallography Quantum Mechanics - electrons are waves Statistical Mechanics - macroscopic quantities - Fermi Energy Electromagnetism Semiconductor Physics What is a Semiconductor? • with conductivity between a conductor and insulator. • whose conductivity can be controlled between conducting and insulating. (by doping or gating) • can be made n -type or p -type. • has a bandgap. • ex.) Silicon, Germanium, GaAs, carbon nanotubes, polymers, etc. A material… What is a “Semiconductor Device”? • Any device that exploits the semiconducting properties of a material. • Contains adjoining n and p -type semiconductors. • Exploits the behavior of electrons between n and p -type semiconducting materials. • Transistor – (modulated from cond/ins) • Diode – (current flows in one direction) •LED
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4 What isn’t a “Semiconductor Device”? • Microchip: Most “electronics” consist of 10 6 of semiconducting devices. • The simplest memory cell consists of >10 semiconducting devices. • A NOR gate consists of more than one semiconducting device. This Class will only discuss the behavior of electrons in fundamental semiconducting devices. The Challenge of Teaching EE338 Materials Science - crystallography Quantum Mechanics - electrons are waves Statistical Mechanics - macroscopic quantities - Fermi Energy Electromagnetism Semiconductor Physics Chapter 1 Consider… •1cm 3 of silicon • What can we say about this material’s behavior? • Assumption: •S i : {1s 2 2s 2 2p 6 3s 2 3p 2 } 10 23 silicon atoms 14 x 10 23 electrons { core electrons valence electrons 14 electrons • Bonding electrons • Free electron carriers • Electron transport properties • Optical properties Tightly bound to the nuclei of atoms
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5 Simplified Problem crystalline semiconductor (e.g. silicon): periodic lattice of “+” ions fixed in space.
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Class1_Slides - Physical Electronics EE.338 Steve Cronin...

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