ee305-Week1-L1-3

ee305-Week1-L1-3 - NCN www.nanohub.org ECE305: Solid State...

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www.nanohub.org NCN ECE305: Solid State Devices cture 1: Introduction Alam ECE-305 S10 1 Lecture 1: Introduction Muhammad Ashraful Alam [email protected]
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Outline 1) Course information 2) Current flow in semiconductors 3) Types of material systems Alam ECE-305 S10 2 4) Classification of crystals Reference: Ch. 1 (pages 3-12)
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Course Information Books ‘Semiconductor Device Fundamentals’ by Robert F. Pierret Website http://cobweb.ecn.purdue.edu/~ee305/ see Prof. Alam’s section Discussion: https://sites.google.com/site/teachingece305and606/ Alam ECE-305 S10 3 HW/Exams HW (9 HW, a random question graded; solutions will be provided 9%) Project for extra credit after each exam (4%). Course evaluation (1% extra credit) 3 exams (~5 weeks apart) … 100% Office hours After class
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Outline of the Course Foundation in Physics Device-specific system design Physical Principle of device operation Resistors (5 wk) Application specific device operation TFT for Displays EE305, EE606 Alam ECE-305 S10 4 MOSFETs ( 3 wks) Theory of Electron Transport In semiconductors Diodes (3 wk) Bipolar (3 wk) CMOS-based Circuits for μ P LASERS for Disk Drives MEMS for Read heads
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Relation to Other MN-Area Courses EE 654: Advanced Semi Dev. EE 612: VLSI Devices EE 520: Bio-Systems EE 695F: RF Design EE 695E: Opto-system BME 695A: Bio-system Design Application specific device operation Device-specific system design Alam ECE-305 S10 5 EE 606: Basic Semi Dev. EE 604 EM, Magnetics Physical Principle of device Operation EE 656: Semi-Transport EE 659: Quantum Transport PHYS 570B : Bio-physics Finite Element, Molecular Dynamics, Monte Carlo Characterization Foundation
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Grand Challenges in Electronics Vacuum Tubes Bipolar MOSFET Spintronics Bio Sensors Now ?? Alam ECE-305 S10 6 1906-1950s 1947-1980s 1960-until now Displays … . ? 1900 1920 1940 1960 1980 2000 2020 Temp Tubes Bipolar MOS
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Outline 1) Course information 2) Current flow in semiconductors 3) Types of material systems Alam ECE-305 S10 7 4) Classification of crystals
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Current Flow Through Semiconductors (5 weeks) I V Carrier Density velocity I G V q n A v = × = × × × Alam ECE-305 S10 8 Depends on chemical composition, crystal structure, temperature, doping, etc. Encapsulated into drift-diffusion equation with recombination-generation (week 3, 4) Encapsulated into concepts of effective masses and occupation factors (week 2)
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Computing Carrier-Density and Velocity Atomic composition - number of electrons per atom Arrangement of atoms - not all electrons are available for conduction Alam ECE-305 S10 9 For Periodic Arrays - simplification for computation Concept of Unit Cells Simple 3-D Unit Cells
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Outline 1) Course information 2) Current flow in semiconductors 3) Types of material systems Alam ECE-305 S10 10 4) Classification of crystals
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Elemental and Compound Semiconductors Compound IV-IV: Si-Ge, Si-C Elemental (e.g., Si, C) I : P aAs Alam ECE-305 S10 11 Not all combinations possible: lattice mismatch, room temp. instability, etc. are concerns III-V: InP, GaAs, (In x Ga 1-x )(As y P 1-y ) IV-VI: PbS II-VI: CdTe
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Arrangement of Atoms: orientation vs. position solid crystals plastic crystals Alam ECE-305 S10 12 liquid crystals liquid
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Arrangement of Atoms Poly-crystalline Thin Film Transistors Amorphous Alam ECE-305 S10 13 Crystalline Oxides
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This note was uploaded on 12/14/2010 for the course ECE 305 taught by Professor Melloch during the Fall '08 term at Purdue.

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ee305-Week1-L1-3 - NCN www.nanohub.org ECE305: Solid State...

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