ECE474S11_Lec09_31Jan11

ECE474S11_Lec09_31Jan11 - ECE 474: Principles of Electronic...

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ECE 474: Principles of Electronic Devices Prof. Virginia Ayres Michigan State University ayresv@msu.edu
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V.M. Ayres, ECE474, Spring 2011 Lecture 09: ± Why it matters ± Discreet energy levels and the hydrogen atom ± “Are electrons waves?” ???!! ¾ Davisson-Germer experiment ¾ e- wavelength Examples of each Chp. 02: What quantization is and why it matters. Several game-changing ideas.
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V.M. Ayres, ECE474, Spring 2011 Lecture 09: ± Why it matters ± Discreet energy levels and the hydrogen atom ± “Are electrons waves?” ???!! ¾ Davisson-Germer experiment ¾ e- wavelength Examples of each Chp. 02: What quantization is and why it matters. Several game-changing ideas.
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V.M. Ayres, ECE474, Spring 2011 Why it matters: ¾ Increase in e-/current speed ¾ Reduction in device physical size ¾ Reduction in scattering Ù heat Ubër-VLSI }
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V.M. Ayres, ECE474, Spring 2011 Why it matters: ¾ Moore’s Law: (Wikipedia) Moore's law describes a long-term trend in the history of computing hardware. The number of transistors that can be placed inexpensively on an integrated circuit has doubled approximately every two years. The trend has continued for more than half a century and is not expected to stop until 2015 or later. ¾ The end of the road
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V.M. Ayres, ECE474, Spring 2011 What the problem is Ù in Chp. 02: Electrons have both particle-like and wavelike properties - particle-like in micron-sized structures - wavelike in nanometer-sized structures
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V.M. Ayres, ECE474, Spring 2011 Electrons have both particle-like and wavelike properties: Consequence: Particle-like electrons in micron-sized transistors means you can make a good OFF Wavelike electrons in nanometer-sized transistors means that you CANNOT make a good OFF due to quantum tunnelling. This is known as the End of the Road: 2015.
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V.M. Ayres, ECE474, Spring 2011 Lecture 09: ± Why it matters ± Discreet energy levels and the hydrogen atom ± “Are electrons waves?” ???!! ¾ Davisson-Germer experiment ¾ e- wavelength Examples of each Chp. 02: What quantization is and why it matters. Several game-changing ideas.
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V.M. Ayres, ECE474, Spring 2011 http://hyperphysics.phy- astr.gsu.edu/hbase/quantum/davger2.html
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V.M. Ayres, ECE474, Spring 2011
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This note was uploaded on 03/01/2011 for the course ECE 474 taught by Professor Ayres during the Spring '09 term at Michigan State University.

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ECE474S11_Lec09_31Jan11 - ECE 474: Principles of Electronic...

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