Let's start with exercise 4.

We will start it again with multiple choice tasks.

Here is the QR code.

First we have a task to deliver special.

When you options you would write it as wrong but not correctly.

that can happen while doing an equation.

Here you should read it accurately

If you think it's wrong, then cross it.

If it's right, then cross it.

You think it's right.

But it's wrong.

Let's do 90 seconds.

Read it through.

Read it through.

Read it through.

Let's look at the results.

So, first question.

Exactly.

Epidixel lateral overgrowth is a process which can quickly create very defective epitaxial layers over a buried oxide.

There are quite a few people who think that's true.

I have a foil with me.

Exactly.

It's wrong.

If it's wrong, it's correct.

Then it would have been crossed.

But now only 20% of the people have crossed it.

Apparently.

I hope it's crossed.

I don't know if it's answered correctly.

If you crossed it, you would think it's wrong.

And that's correct.

Not many people crossed it.

I'm going to find out.

Let's take a look at what the EU is doing.

We have a silicon wafer, oxide with gaps.

And through these gaps we have contact to the silicon.

This allows us to overgrow our oxide epitaxially.

Which looks like this at the end.

We have a silicon on an oxide layer.

On the one hand, it's fast.

But the disadvantage is that it's slow.

It takes a long time.

That's why it's wrong.

Here it's simply shown what the procedure is.

What are the advantages and disadvantages.

But the answer would be wrong.

It would have to be crossed.

Not many people did that.

Next question was the SIMOX procedure.

What is the SIMOX procedure?