The ups and downs of life in the Siheyuan

Li Yuan, who was thinking about something, was stunned when he was asked, and Liu Yan asked again.

"Uh! When talking about monocrystalline silicon, let's start with polycrystalline silicon.

I have conducted special research and found that the purity of polysilicon produced by Kyoto Glass Factory has reached 9 through a special chemical purification process.

However, after we prepared single crystal silicon, the purity dropped so much.

This should be related to contamination during the preparation of single crystal silicon.

There should be two main sources of pollution, one is air impurity pollution, and the other is related to elements released during the electric heating process.

Therefore, the methods of controlling purity mentioned just now are all good.”

This old guy is telling lies with his eyes open.

In fact, he only listened to the beginning, and he only listened to the content of their discussion afterwards, without taking it too seriously.

Because all operations involve direct human contact, this design is very unfriendly to operators.

He thought of a piece of equipment, a vacuum furnace, that was one of the projects aided by Big Brother.

Although today's vacuum furnace is only -3 power, it is sufficient for the preparation of single crystal silicon.

The only thing that needs to be considered is that it needs to be specially made, that is, a cylinder needs to be added to the upper end of the existing vacuum furnace.

A lifting device is installed at the highest end of the cylinder.

It’s just that this device can no longer use a screw, otherwise, the cylinder must be designed to be high enough.

In this way, the strength and fixation method of the cylinder will become new design difficulties.

Therefore, using special slide rails and nooses, and using external electromagnetic induction for driving is the best choice.

He was thinking about this process issue just now.

Seeing that everyone was waiting for the next step, he hurriedly told everyone about the idea of ​​the vacuum furnace.

"This is a wonderful idea! It not only solves the problem of pollution, but also solves the problem of personnel protection," Teacher A said.

"Actually, this process can not only solve the above problems, but also can be used for surface oxidation treatment if the design is changed," Teacher B said.

"Then if its shape is changed, can it be used for metal deposition?" asked student A.

"In fact, metal deposition does not need to be so complicated. You can use a hydrogen reactor and directly use the vapor deposition method." Li Yuan put forward a different view.

"The manufacturing of a hydrogen reactor is relatively easy, which is a good idea. But what kind of process is this vapor deposition method?" Teacher A asked.

Li Yuan explained the theory and methods of chemical vapor deposition to everyone.

"Li Yuan, you are so knowledgeable. Where did you learn this vapor deposition method?"

Teacher B was confused. After working in semiconductors for so many years, he had only scratched the surface of CVD technology.

He also knows that this technology is now being used in semiconductor manufacturing in the West.

Due to the tight blockade, they have been unable to get a full view.

If Li Yuan really masters this technology, domestic semiconductors can be smaller in size, thereby reducing costs and improving yield.

Other teachers and students also had the same dilemma. When Li Yuan talked about CVD technology, they all listened attentively to his answer.

“I have also seen CVD technology in many magazines and some information in Western Europe, but the information was vague.

When I was in school, I was lucky enough to get a book explaining modern chemistry, which also mentioned CVD technology.

Combining the above and summarizing it, we can know the basic principles of this technology.

After that, I also did a long period of derivation and gained some experience.

We still have a certain degree of confidence in reproducing CVD technology."

The reason why I dare to say this is that I am not afraid of being investigated by interested people. Anyway, I have been to Xiangjiang, as well as libraries and bookstores.

Once asked, they say that retreat is a loss, let alone a seamless one.

After Li Yuan finished explaining, everyone thought silently.

After nearly half a year of getting along, everyone has somewhat understood Li Yuan's character.

He has always been rigorous when it comes to science, and he generally does not raise matters that he is not sure about.

So judging from his expression, everyone feels that the certainty is quite high.

At everyone's unanimous request, Li Yuan became a teacher and explained the principles of CVD technology to everyone.

and his derivation process.

In fact, he completed this derivation process during the winter vacation.

Because Li Yuan has a deeper understanding, the content of his explanations is relatively easy to understand.

In less than a day, when everyone finally felt tired, most people finally understood what CVD technology is.

"Oh, listening to you is better than ten years of reading," Teacher A said.

"This is not listening to a lecture, this is enlightenment," Teacher B said.

"Teacher Li, you will be our teacher from now on," Student A said.

Others echoed.

They are all adults and can be admitted to Huaqing University. Their IQs are not low and their emotional intelligence is not bad either.

Everyone is grateful for Li Yuan's selfless contribution today.

Team leader Liu Yan was very happy.

Since Li Yuan joined, the projects they are responsible for can be said to have advanced by leaps and bounds.

What's even more commendable is that the atmosphere in the entire group is very good.

She is also very motivated to study and work overtime, which makes her worry less.

After such a long period of contact, this kid, even though I have only seen him for less than half a year, has already shown his mastery of semiconductor knowledge.

Sometimes, it's more like an encyclopedia.

I don’t know how his head grew. Thinking of this, I can’t even feel jealous.

Once the direction is certain, the next work will be relatively easy.

Everyone discussed the needs for wafer straight pulling vacuum furnaces, oxidation furnaces, and hydrogen reactors.

Then the division of labor began, and Li Yuan was responsible for formulating the requirements for the lifting vacuum furnace.

Teacher A is responsible for formulating the requirements for the oxidation furnace.

Teacher B is responsible for formulating the requirements for the hydrogen reactor.

For the design and implementation of the three types of equipment, you can seek help from the Precision Instrument Department.

The last leadership inspection required the school to strongly support the development of semiconductor laboratories.

Everyone knows how to pull a tiger's skin and pull a big banner.

Therefore, Huang Yan is not worried at all whether the Department of Precision Instruments will refuse.

At the end, Li Yuan found Huang Yan alone.

"Mr. Huang, the changes to the wafer straight pull vacuum furnace are relatively large. I'm worried that it will be difficult for them in the precision department to understand the needs, so I should design this wafer straight pull vacuum furnace."

"Ah, you still dare to do this."

Li Yuan briefly introduced his past in the machinery factory.

"Oh my god, I didn't expect you to understand mechanical design. In addition, you also understand electrical design. This plan was proposed by you, so it is indeed most suitable for you to design it.

Li Yuan, keep working hard, I am optimistic about you, the country needs people like you."

I am very happy that issues related to production capacity and purity have been solved today.

When she heard that Li Yuan knew so many things, she was not only surprised, but also happy.

With Li Yuan, she can do more things and design the entire system equipment for wafer preparation.

For example, cutting, rolling, slicing, chamfering, polishing and other related processes after oxidation treatment.

There is currently no equipment suitable for industrial production of these processes.

These will be completely handed over to Li Yuan in the future.

With his learning ability, strong comprehensive analysis ability, and occasional flashes of inspiration, he is definitely the best candidate.

Huang Yan stared at Li Yuan with a smile, which made Li Yuan feel scared.

He didn't think about the relationship between men and women, because universities in this era were still very holy, and Huang Yan's daily behavior was not that kind of person.

Just looking at her expression, Li Yuan knew that this was another plot.