Semiconductor Devices and Models 2
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1 Semiconductor Devices and Models 2 HBTs BJTs FETs Please stop for a minute and look at these viewgraphs 1
2 Instructor: Michael Shur Affiliation: Electrical, Computer, and Systems Engineering, Physics and Broadband Center for Data Transport Science and Technology Research Interests: Device and Circuit Design, Characterization, Novel Device Concepts, UV LEDs, Solid State Lighting Teaching Interests: Semiconductor Device Physics, New Devices and Compound Semiconductors 2
3 Recent research Plasma Wave Electronics New semiconductor materials for high power and high temperature operation Solid State Lighting Flexible electronics (TFTs, OTFTs) Visit for more information Knowledge (Displayed in the Senate Building DC 3
4 UV LEDs for water purification Recent Research Pictures Flexible Electronics Room Temperature Resonant Plasma Wave THz Detection Solid State Lighting 4
5 Electronics on Flexible Substrates Sensitive Skin Wearable electronics by Flexible solar panels by Smart shoe with built in microprocessor by 5
6 Subject description The principle of operation, device physics, and analytical numerical, and circuit device models for bipolar junction transistors, metal-semiconductor junction transistors, heterostructure junctions and transistors, and wide band gap field effect transistors 6
7 Grading: Other information Homework 50% (5 home work assignments) Final Project 50% Required Textbook Michael Shur, Introduction to Electronic Devices, John Wiley, 1996, ISBN Software AIM-Spice (can be downloaded from Prerequisites by Topics: Basic knowledge of calculus and electrostatics 7
8 Overall Goals Master Fundamentals of Electronic Devices Develop problem solving skills Develop skills of running a research project and presenting the results 8
9 Problem Solving Skills Example In which direction is the bus pictured below traveling left or right?" 9
10 Answer from kindergarten students The kindergarten students all answered "left." When asked, "Why do you think the bus is traveling in the left direction?" they answered: "Because you can't see the door." 10
11 Problem Solving Skills Example # 2 Consider an infinite plane colored in arbitrary way in two colors Prove that you can always place a line of an arbitrary length on such a plane in such a way that two ends of the line will be in the regions with of the same color 11
12 Solution Consider an equilateral triangle with all the sides being equal to the length of this line. Put such a triangle on the plane. It has three vortices but there only two colors. Hence, two of these vortices must belong to the regions with the same color 12
13 Detailed course description (page 1 of 13) 1. Introduction and review. Course goals and outline Semiconductor materials 2. Basic semiconductor equations Device building blocks: Schottky, ohmic contacts, p-n junctions 13
14 Detailed course description (page 2 of 13) 2. Bipolar Junction Transistor. The principle of operation Device physics High injection effects Modes of operation Current, voltage, and power gains Input and output impedances 14
15 Detailed course description (page 3 of 13) 3. Bipolar Junction Transistor modeling Ebers-Moll model Gummel-Poon model BJT models in SPICE BJT parameter extraction BJT breakdown 15
16 Detailed course description (page 4 of 13) 4. High Frequency Performance s-parameters Cutoff frequency and fmax Microwave BJTs Microwave amplifiers 16
17 Detailed course description (page 5 of 13) 5. BiCMOS FET versus BJT CMOS BiCMOS technology 17
18 Detailed course description (page 6 of 13) 6. Heterostructure Bipolar Transistors Principle of operation Materials systems HBT designs State-of-the art performance HBT modeling HBT models in SPICE 18
19 Detailed course description (page 7 of 13) 7. BJT and HBT fabrication Designs Packaging Interconnects Passive components 19
20 Detailed course description (page 8 of 13) 8. Metal Semiconductor Field Effect Transistors Principle of operation Materials systems MESFET designs State-of-the art performance MESFET modeling MESFET models in SPICE MESFETs and MMICs 20
21 Detailed course description (page 9 of 13) 9. Heterostructure Field Effect Transistors Principle of operation Materials systems HFET designs State-of-the art performance HFET modeling HFET models in SPICE 21
22 Detailed course description (page 10 of 13) 10. WIDE BAND GAP MATERIALS AND DEVICES Materials systems: SiC, III-N, diamond SiC MOS III-N FETs 22
23 Detailed course description (page 11 of 13) 11. Microwave and millimeter waves 12 Compound semiconductor digital integrated circuits 13. High speed transistors. Summary. Performance Comparison and new device physics ITRS Si versus III-V Si versus III-N Interconnect issue Contact issues 23
24 Detailed course description (page 12 of 13) 14. Solid state lighting LEDs Photometry and human vision Color rendering Smart lighting Beyond visible UV LEDs 24
25 Detailed course description (page 13 of 13) Final Projects Review and presentations of Final Projects. Each paper should contain: 1. A brief history of the subject, including important milestones, dates, names of principal contributors and their affiliations. 2. Review of the state-of-the-art. 3. Comments on controversies, if any. 4. Author's own thoughts, calculations, estimates, suggestions, etc. 5. Suggestions for further studies. 6. Key references. 7. Index. Each project will be reviewed by other students 25
26 Some of Previous Projects SiC DMOS Thermal computer elements SiC MESFETs SiC MOSFETs Si MOSFET Scaling High Temperature Performance of Compound Semiconductor FETs Cool MOSFET Night Vision Devices CMOS, BJTs, BICMOS Si-Ge BJTs 26
27 Other Project Topics SiC HBTs GaN/AlGaN HBTs BJTs versus FETs All course material is on the WEB: 27
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Semiconductor Devices Non-linear Devices Diodes Introduction. The diode is two terminal non linear device whose I-V characteristic besides exhibiting non-linear behavior is also polarity dependent. The
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