Name: Nanotechnology: Fundamentals of Nanotransistors | PurdueX on edX | Course About Video
Uploaded: 2016-12-08T20:29:00.000Z
Duration: 3 min 33 s
Description: Thousands of YouTube videos with English-Chinese subtitles! Now you can learn to understand native speakers, expand your vocabulary, and improve your pronunciation...

And I'd like to tell you a little bit about this course on nanotransistors

Transistors are the basic building blocks of all electronic systems.

There are billions of them in these devices that we carry around.

And when we fire up an app, and do a Google search, or whatever,

there are many more billions that are doing the work out in the cloud.

And they're also fascinating from a scientific perspective.

This is a cross-sectional electron micrograph.

There are three main components, a source, a drain,

and a gate that controls the flow of electrons from the source to the drain.

When we switch the device on, electrons flow from the source to the drain

The first objective of this course is to understand the physical operation

of these devices, the flow of electrons and holes inside the transistor.

The second objective of this course is to relate

what goes on the inside to the voltages that we apply to the terminals

and to the currents that flow through those

leads, to understand why the IV characteristics have

this particular shape, and what makes a particular characteristic

useful from an application perspective, and to relate all of that back to what

Now, what I think is most interesting about this course

is the flow of electrons in these incredibly small structures.

The first transistors were made with gaps between the source and the drain,

or channels, that were 10,000 nanometers long.

My first job was working on 5,000 nanometer technology.

We're talking already about five nanometer technology.

So the dimensions of these transistors have shrunk to incredibly small sizes.

This has forced us to rethink our understanding about how electrons

Now, there was a good deal of fundamental scientific work

that went on in the last decade or so of the 20th century where scientists

produced very small structures and learned

how to understand current flow at the nano and molecular scale.

We had to do things like rethink what Ohm's law means at the nano scale.

The result of this work was a new understanding

of electron flow in very small structures,

a very simple, elegant, and physically sound way to think about current flow

And it is time, now, to bring that new insight, and understanding, and ways

of thinking to this very practical and important device.

So this is a course that is designed both for people

who know something about transistors and for people who are new to transistors.

The first half of the course reviews some fundamentals

and some concepts that haven't changed a lot

The really unique part of the class is the second half,

where we bring these new ways of thinking

about current flow in nanostructures to this very important device.

So it's an opportunity to see how some fascinating nanophysics plays out

in the context of a very practical and very important device.

So if you're interested in learning more, I hope to see you in the course.