Hand rubbing nuclear fusion live in the wilderness

Chapter 281 What is the easiest way to guarantee research

The high-purity silicon nitride material substrate is undergoing 'isothermal-ion infiltration' processing,
On the one hand, Won is multi-tasking and taking care of it, and on the other hand, under certain conditions, the indium arsenic phosphide composite material used to prepare the 'active layer' is purified and filtered again.

The purification equipment is in the dust-free studio, and it is assembled from the parts he exchanged through the system mall before.

It has not been touched since it was assembled, so there is no need to worry about cleanliness.

Filter once, purify once, and the treated 'indium arsenic phosphide composite material' is stored in a special container to keep it in a liquid state for future use.

Treat the silicon nitride substrate, filter and purify the active layer.

It has been about two hours since these two preparation steps were completed.

The viewers in the live broadcast room fell asleep after watching the boring steps, and most of the viewers left the live broadcast room to go about their own affairs.

The viewers who stayed after being extremely bored either hung up, or chatted with each other in the live broadcast room with barrage, or asked each other if they had any horses.

As for the optical experts in the live broadcast room from various scientific research institutes in various countries, they stared at the live broadcast screen intently, for fear of missing any details.

Even though there was a lot of doubts in their hearts, no one sent barrage or private messages to ask.

This anchor usually doesn't answer some professional questions at all, and only has the opportunity when the broadcast starts or when it is downloaded.

Whenever a professional question is answered, the person who asks the question is full of surprises like an ancient concubine whose name was turned over by the emperor.

After the silicon nitride substrate, active layer, thin film layer and other materials were prepared, Han Yuan paused for a while and sat down on the ground for a nap.

If he didn't rest for a while, he would feel that his brain was going to be overloaded.

Dealing with two things at the same time made him so busy that he flew up like a precision-set instrument with limited functions. There were no other brain cells to control his speech.

After resting for about ten minutes, Han Yuan recovered a little energy, stood up, pulled the camera and said:
"Now the silicon nitride substrate of the 'distributed Bragg reflector' has been prepared, and then I will give it periodic plating and engraving of the active layer and thin film layer."

"Although the preparation of Bragg mirrors by chemical vapor deposition requires more steps than other methods, in practice, the speed is faster when there are special instruments."

"The first step is to clean the silicon nitride material just prepared, and then put it into the chamber to heat up."

"After the temperature rises to a certain level, use the 'isothermal-ion doping method' to invade a layer of ion plating on the surface."

"Ion implanters can be used here, and the effect will be better than 'ion-doped hair'."

"Because the high-energy ion implanter can implant ions deeper into the silicon nitride substrate lattice."

"And relatively speaking, the time required to implant the ion layer using a high-energy ion implanter is shorter, which is more suitable for mass production."

"However, there are also disadvantages. After using a high-energy ion implanter, the ions colliding at high speed will damage the crystal lattice of the silicon nitride substrate, and a filling of silicon nitride ions is required."

"As for the isothermal-ion doping method, it will take a lot of time."

"To process a silicon nitride substrate, if it only takes 3 minutes after the high-energy ion implanter is started, then it takes more than two hours to use the 'isothermal-ion doping method'."

"And someone must keep an eye on the ion concentration index in the ion solution during the process, and it must be replenished immediately before it drops to the warning line."

"As for the advantages, there are still some. The 'isothermal-ion doping method' destroys the silicon nitride substrate with a low lattice coefficient, and there is no need to perform an additional operation of replenishing silicon nitride ions."

This time, many of the audience in the live broadcast room understood what Han Yuan said.

After all, Won has used the 'isothermal-ion doping method' many times before, and every time he uses it, he will explain the advantages and disadvantages by the way.

[In this way, it is better to use an ion implanter for mass industrial production. 】

[Understood, I'm going to buy a high-energy ion implanter and come back. (dog head)]

[Knock on the blackboard, this is the key point, everyone take a notebook and write it down! 】

[I'm sorry, you typed on the wrong blackboard! 】

[Upstairs, you should knock on the blackboards of the following units: @中国科学院, @青华大学, @BJ大学, @华国科技大学]

[Look down on me at Shanghai University?There is no name? 】

【Do not care?My East China University of Science and Technology has no name? 】

[Don't make trouble, 'East China University of Technology' still needs a small notebook?Just take the earphones, I guarantee you can learn ()()]

[By the way, when can we have our own top-level lithography machine?This thing is too frustrating. 】

[It's coming soon, when this anchor can make a top-level lithography machine, we will have it. 】

[Come, come, let's discuss, what is the most bizarre method of insurance research you have ever seen? 】

[When the upstairs said this, I immediately felt relieved. 】

[I'll come first, my grandfather is the vice principal, and the research is a piece of cake, very easy! 】

[No matter how easy it is, it's not as easy as holding the earphones. Once you grab it, you will get the qualifications, and you will be happy. 】

[The first attack rune of the burglary omen has been equipped! 】

On the virtual screen, barrages flowed like flowing water.

The audience didn't have much discussion about whether the Korean Won could produce a 'distributed Bragg reflector', instead they started teasing various universities in China one by one.

In particular, some recent events have occupied most of the barrage.

It just so happens that other places do not allow discussions at all, especially some people in a certain university. In their eyes, they are not students of 985-level schools and are not eligible to participate in discussions at all.

As for whether the country actually arranges for people to study in this live broadcast room, ordinary viewers don't worry at all.

They dare to say that the live broadcast room has been opened for a few days, and the higher-ups probably already know about it.

A live broadcast room that is suspected to be an alien is sure to be monitored 24 hours a day.

After all, this is the country of Hua, the country with the strongest control, not some other messy country with constant shootings all day long.

The barrage was noisy, and Han Yuan and the experts in the studio ignored the audience.

The experts in the live broadcast room did not open the barrage at all to ensure the details.

As for Won, although he watched the barrage, he didn't know much about what happened in the real world after staying in the simulation space for a long time.

After all, every time I go back, I just show my face and make a phone call to report to my parents that they are safe.

It's been a long time since he surfed the Internet and played games.

The news from the outside world is blocked, as if the village has not yet connected to the Internet, and the acquisition of information depends entirely on person-to-person transmission.

But sometimes he can still get something of interest from the barrage in the live broadcast room.

For example, this time, Han Yuan was more interested in the East China University of Science and Technology that the audience talked about.

Steal headphones?Baoyan?
what's the situation?
Shaking his head, Han Yuan came back to his senses, kept this matter in his heart, and planned to check what happened next time he went back.

For now, let's move on to 'Distributed Bragg Reflectors'.

Ionization, heating, plating and engraving, the bottom layer of the active layer is formed for the first time, and the high reflective film layer is formed for the first time.
A series of operating procedures were constantly changing in his hands, and time passed bit by bit.

On the silicon nitride substrate, a periodic structure composed of alternately arranged materials with different refractive indices is slowly and continuously superimposed at a speed invisible to the naked eye.

Busy until after ten o'clock in the evening, Han Yuan stopped what he was doing.

In his hands, a piece of silicon nitride 'distributed Bragg reflector' covered with multi-layer 'active layer' and 'film layer' periodic structure has been basically completed.

A faint non-metallic light can already be seen on the surface of the silicon nitride crystal material held in hand.

This is formed after the periodic structure of 'active layer' and 'thin film layer' is arranged.

There are still two final steps left.

The first step is to plate and engrave a Bn thin film layer on the surface.

The other is to dope Cr ions and α·AlO ions on the Bn film layer.

If you have seen the preparation of sapphire glass before, you will know that Cr: AlO is a metal crystal structure formed by compounding in the preparation of sapphire glass.

Although the conditions for formation are relatively harsh, it is not impossible.

Through special means, Won can inject two kinds of ions into the Bn film layer at the same time, and finally form a monolithic stable Cr: AlO crystal structure.

This step is used to make up for the ion vacancy defect caused by the silicon nitride material as the substrate, which can enhance the reflectivity of light and the mirror effect.

After dealing with the remaining two parts, a complete 'distributed Bragg reflector' is completed.

As for the reason why it is considered complete, it is because it has not passed various tests.

So it can only be 'counted' completed.

Only after a detailed and complete inspection process can the prepared 'distributed Bragg reflector' be truly prepared.

Although he currently does not have professional equipment to conduct a detailed inspection on it, Han Yuan still has confidence in the things he has made himself.

And it's not that he doesn't do no tests at all, he can definitely arrange for some routine checks that can be done.

In the dead of night, at [-]:[-], Han Yuan stopped today's live broadcast. Counting today, there are [-] hours of live broadcast time.

Most importantly, they are still working.

Such a long working hours, even he himself can't bear it, let alone those experts with weak physique.

Although the experts and scientific research scholars studying in the live broadcast room only need to watch the live video to learn.

But more than ten hours of concentrated study is far beyond the range that normal people can bear.

When they graduated from high school, postgraduate entrance examination, and doctoral degree, they never had such a toss. They never thought that now they are 50 or [-] years old, and they have to go back to the sea of ​​study.

Although it is fun, but the intensity is too much to kill.

Remember when you live broadcasted the manufacture of lithium-sulfur batteries?At that time, an academician was tossed into the hospital.

This time it was even worse, if it wasn't for the staff rotation set up above, and a special person was arranged to take care of it.

Otherwise, the preparation of the 'distributed Bragg reflector' this time will allow a large number of optical experts to live in the hospital and watch the live broadcast.

Working more than ten hours a day, is this human?
Capitalists are not so ruthless.

Time is like running water, two days passed quickly.

In the case of working for about fifteen hours a day, Won has successfully completed the preparation of the 'distributed Bragg reflector'.

The finished product also successfully passed all basic tests.

In addition to the reflectors, Won spent some time preparing mirrors such as lenses and concave mirrors for the light transmission system.

The completion of the preparation of 'distributed Bragg mirror' and ordinary lenses and other mirrors, announced that the preparation of the lithography machine has come to an end.

The remaining controller-related parts such as energy controllers and photometric controllers are much less difficult than light sources and light mirrors.

At least on the hardware, and for the won.

After all, a large part of the key core of parts such as controllers lies in software control.

And this part of the Korean won cannot be dealt with temporarily.

Although the number of operations of a transistor computer has reached about 600 million times per second, this operation speed is pitifully low for a computer.

A modern control program of any kind goes far beyond its calculations.

Han Yuan is not going to toss about the computer control program for the time being, he is going to use some calculation methods on the magnetic crystal board combined with manual operation to engrave the circuit diagram of the chip.

It just means that in this way, the time required to control the lithography machine to engrave the circuit diagram on the chip is not short.

The circuit diagram in a modern integrated chip is extremely complex, consisting of hundreds of millions of crystal lights.

With this amount, Han Yuan can control the photolithography machine for manual exposure, not to mention a year, even ten years.

Not to mention the accuracy problem, even the design and manufacture of the mask plate cannot be completed.

The principle of the lithography machine can be understood in the simplest terms.

In fact, it is a beam of light that shines on the chip to remove the protective film on the surface of the chip wafer.

Then use a corrosive agent to corrode the part that lost the protective film to form a circuit.

As for the mask plate, the mask plate is not the same thing as the mask table prepared by Korean won before.

Mask tables are used to hold wafers.

The mask plate is an engraving of the circuit diagram.

Everyone has played shadow games when they were young. With one hand, under the light of the light, various shadows can be formed on the wall.

Such as lively and lovely little white rabbits, eagles flying high, vicious and cunning big bad wolves, naive little fat pigs and other animals.

The role of the mask plate is the same as that of the hand. The required circuit diagram is engraved on the mask plate in advance, and then covered on the surface of the chip wafer.

Then through the light source, the part of the circuit diagram that you want to remove can be removed.

Of course, this is a simple explanation for ease of understanding.

In fact, there are hundreds of steps to go from a monocrystalline silicon wafer to a chip, and the level of complexity simply cannot be handled by a single company.

(End of this chapter)