From Almighty Scholar to Chief Scientist

Chapter 238
The workshop assembly line started to operate. First of all, everyone's attention was naturally on the purification speed.

Heaps of sand that had been pre-filtered were thrown into the electric arc furnace. The temperature in the electric arc furnace was as high as [-] degrees Celsius. It also contained coke, which was also used to deal with impurities.

However, since Lin Xiao is optimizing the production process, all the steps naturally have his new design. The structure inside the electric arc furnace has been modified, and now there is a structure similar to a honeycomb inside. Structure can make the whole response more fully and quickly.

Of course, such a structure is obviously not enough. This honeycomb-like structure is also customized by Lin Xiao according to the internal structure of their electric arc furnace, after calculation, and then according to the physical and chemical reaction mechanism.

And his structure can make the internal reaction more fully, so that the internal coke can more completely deprive the two oxygen ions from the sand, the silicon dioxide.

The people present looked at the electric arc furnace in front of them, even if they stood at a long distance, they seemed to be able to feel the temperature inside.

"How long will this take to cook?"

Yu Jiancheng couldn't help asking.

"Three hours." Lin Xiao said.

"Only three hours?"

Yu Jiancheng was shocked, "We used to burn a furnace for four or five hours."

In this way, wouldn't the firing speed be directly increased by 20%-25%?
Such an improvement is not insignificant.

Lin Xiao smiled and said, "As long as my calculations are correct, there must be no problem."

At this time, a process design engineer next to him couldn't help asking: "Professor Lin, can you tell me the principle behind it?"

This process design engineer is called Lu Zhang, and he is a process design engineer of Shanghai Silicon Industry. The original process of this production line, including the purification process, was also designed by this engineer.

Now that Lin Xiao has optimized these processes, he, an engineer, of course wants to come and take a look.

And Lin Xiao glanced at Lu Zhang, just smiled slightly, and uttered two words: "Magnetic field."

The people around couldn't help being taken aback.

magnetic field?

Lu Zhang was also puzzled: "Why is it a magnetic field?"

"Our electric arc furnace is smelted through the high temperature generated by the electrode arc, so these arcs can naturally generate a magnetic field inside."

"The magnetic field can affect the internal reaction."

Hearing what Lin Xiao said, Lu Zhang was puzzled for a while, and then showed a shocked expression.

"You mean, by controlling the internal magnetic field, you increased the reaction rate and made the internal reaction more complete?"

"Yes."

Lin Xiao nodded.

The high temperature inside the electric arc furnace comes from the discharge, and the arc generated by the electrodes will cause the appearance of a magnetic field. Generally speaking, these magnetic fields will always have some influence on the internal reaction.

The essence of a chemical reaction is the transfer of internal electrons. The reaction in an electric arc furnace is the oxidation-reduction reaction of silicon dioxide and carbon at high temperature, eventually forming elemental silicon and carbon monoxide. The reaction equation can probably be written by junior high school students.

In the process, the magnetic field generated by the arc will affect the electron migration process in the chemical reaction process.

It's just that in the past, designers generally didn't consider this kind of problem. After all, it is enough to be able to fully respond. Although the magnetic field generated by the arc can have a certain impact on the reaction, but because a chaotic system has been formed inside, the magnetic field is in each Under the offset of the direction, its effect can be ignored, and then after a longer reaction, the first step of the rough refining process can be completed.

However, Lin Xiao did not choose this traditional method, but chose to change the influence process of the magnetic field directly by changing the internal structure. He used the honeycomb structure to allow the arc to be affected by the honeycomb structure, so the magnetic field generated by the arc It can also be determined.

Then he counts all the particles participating in the reaction inside, and calculates how to use the controlled magnetic field to promote the rate of the chemical reaction based on the statistical results. In addition, he can also control the internal opposite-sex ions to approach each other, thereby making the reaction more complete. .

From these results, he was able to build this honeycomb-like structure.

Moreover, there can only be one kind of honeycomb structure built by the same electric arc furnace. If different electric arc furnaces want to copy it, unless they can do it again according to Lin Xiao's calculation ideas, it is obviously impossible to do it. Such a result can only be a waste of effort.

But obviously, Lin Xiao's calculation idea only exists in his mind. If other people want to reverse it, they must be at least half as strong as him in mathematics, chemistry, and physics.

And it has to be professional.

As for such a person, are there any in this world...

Lin Xiao does not comment on this, and should be humble.

But Lu Zhang next to him was shocked by Lin Xiao's confirmation just now.

Use the magnetic field inside the electric arc furnace to speed up the internal chemical reaction rate... Is this the level that they earthlings can do now?
But thinking about Lin Xiao's illustrious reputation, so many things that sound incredible have been completed by Lin Xiao, just controlling the magnetic field inside an electric arc furnace...

It doesn't seem to sound so tall?
Lu Zhang looked at Yu Jiancheng next to him, and suddenly wanted to tell him that he wanted to resign and study under Lin Xiao. Although he was in his 40s and was 20 years older than Lin Xiao, he was a teacher. Well, there is no shame in studying under a top scientist like Lin Xiao.

He just gave up on this idea after thinking about his family and the house he bought with a loan in Shanghai.

"Okay, this one has to wait for three hours, let's go and see the polishing first."

At this time, Lin Xiao's voice reminded the people present.

Everyone came back to their senses and realized this matter.

After all, the stove would still be burning for three hours, and they couldn't wait here for three hours, so they quickly headed to the polishing machine that was in the process of polishing.

Luo Ming looked at the polishing machine, the last time he came here was the last time.

At that time, he saw that with the addition of the new polishing disc, their polishing accuracy reached the level of 4nm, and this time, they had a new polishing liquid. According to Lin Xiao, this can improve their polishing accuracy. Raise to the level of 2nm.

He was already looking forward to this.

It didn't take long, because some unpolished silicon wafers were stored before, so this time they can put these unpolished silicon wafers on it for experiments.

As the machine is running, the planetary polishing process of the polishing machine is operating again, and liquid overflow can also be seen on both sides. These liquids are their new polishing liquid. This polishing liquid is composed of silicon powder and sodium hydroxide. There are a few other substances that make up a small percentage, but also handle the polishing process.

CMP polishing refers to chemical mechanical polishing. As the name implies, there are both chemical polishing and mechanical polishing, and chemical polishing is in charge of polishing liquid.

The composition of sodium hydroxide can react to the surface unevenness of the wafer to make the surface more flat, while the silicon powder can continue to gradually wear away the internal unevenness during friction.

In this process, the proportion of these two substances is a key issue.

The excellent matching ratio also greatly improves the polishing effect.

And Lin Xiao obtained the internal composition and ratio of this polishing liquid from the system, which undoubtedly belongs to a very good ratio. In addition, it is also very compatible with the material of the grinding disc. With the two phases, their polishing efficiency can reach an extreme. high degree.

In this way, as time passed, the first batch of silicon wafers came out, and then they quickly took the batch of silicon wafers under the laser interferometer for measurement to determine their surface accuracy.

It didn't take long for the results to come out.

"The average precision of the surface has reached the level of 2nm! There are still a few parts that have reached 1nm!"

The surveyors announced this exciting news, and immediately many people in the production line workshop cheered.

Luo Ming also showed an excited look on his face.

Unexpectedly, Professor Lin said that 2nm is 2nm, there is no ambiguity at all!

In this way, with this new type of polishing fluid, the service life of their polishing discs can also be improved!
In this way, the cost can also be reduced.

Thinking of this, he became more and more excited.

In this case, within half a year, Huaguo will be able to easily occupy an important position in the world's silicon wafer production.

At the same time, this will also become a key node occupied by Huaguo in the semiconductor industry chain!
And one year later, they will have the opportunity to occupy half of the world market. Three years later, in the silicon wafer, the world only knows that it is made in China, but not the one that used to be made in Japan!
In addition, polishing discs and polishing liquid will also become their important export products. Of course, such good things must first meet domestic demand, and then sell them abroad if there is spare capacity.

Thinking of this, Luo Ming became more and more happy.

Then, he held Lin Xiao's hand tightly and said, "Professor Lin, thank you for your dedication!"

Lin Xiao smiled and waved his hands, and said, "What are you talking about, each of us has contributed."

"But it's obvious that Professor Lin paid the most." Yu Jiancheng, who was next to him, also came up, rubbed his hands, and said, "Professor Lin, look at your polishing fluid, let's..."

Lin Xiao smiled and said: "Polishing liquid also needs to build a factory, so you don't have to worry, but we will definitely satisfy your company first."

Of course, it is also necessary to avoid raising the silicon industry too much to prevent its appetite from growing.

And this process requires support for more domestic manufacturers.

Only by working together and competing together can the domestic industry be more dynamic.

Just like Japan's silicon wafers can occupy a large share in the world because of internal competition.

Of course, it is also necessary to prevent healthy competition from turning into vicious involution.

This is especially common in China.

Although Huaguo is known as the world's factory, various factories have received countless orders from foreign manufacturers, but there are too many homogeneous factories without technology, which has caused these factories to fall into price competition in order to compete for these orders. involution.

The price involution is to use lower and lower prices to grab those orders from abroad. If there is no order, the factory will close down, so the profit is getting lower and lower, and the wages of the workers are getting lower and lower.

For this situation, it is not easy to solve it, but this is also because these factories do not have real technology.

As a high-tech industry, silicon wafer fabs obviously cannot be involved. This is a problem that is both necessary and necessary.

Therefore, there should not be too many manufacturers to support in the future.

Of course, this issue is not what Lin Xiao needs to consider now, and someone will consider it in the future.

He no longer paid attention to the polishing here, and said: "Okay, let's take a look at our purification effect later, and then we can look forward to our final production efficiency ten days later."

"it is good!"

People responded one after another, and after waiting for two hours, they returned to the electric arc furnace they had seen before.

After three hours of high-temperature reaction, the reaction inside is basically very sufficient.

Then, the silicon inside was poured out, and after waiting for the temperature to drop, it was transferred to another place for further purification, that is, the silicon was refined with hydrogen chloride, and then the chemical vapor deposition method was used to obtain more pure polysilicon, also It is silicon with a purity of eleven nines, which can already be called a pure substance.

For this step, Lin Xiao also made changes.

It is also an adjustment to the vapor deposition method.

The vapor phase deposition method is to introduce two gaseous raw materials into the reaction chamber for reaction, and finally form a new material, which is deposited on the surface of the wafer.

There are many factors that affect the final reaction, including the pressure in the reaction chamber, the temperature of the wafer, the flow rate of the gas, the distance of the gas passing through the wafer, etc., all of which will affect the final purity.

Lin Xiao went back to his old job again, took out his comprehensive calculation of the chaotic system, and finally calculated a more accurate value of each parameter for their vapor deposition process.

In this way, they can more easily extract pure polysilicon.

Of course, this method is relatively straightforward, and Lu Zhang can see it, so he has no problem with it, but the method is too hard-core, which is probably equivalent to decomposing the prime factors of a large number. Lin Xiao can see it at a glance , while others can only count one by one, so this method cannot be reproduced.

The next third step is to use the pulling method to pull the molten polysilicon to gradually form silicon rods.

This step is common throughout the world, and Lin Xiao did not modify it. Of course, the polysilicon obtained in the first two steps is already pure enough, and this step of pulling method will not change the purity, so Lin Xiao does not need to think about it.

It took everyone half a day to visit, and the final result obviously surprised everyone.

Such a production line belongs to the top silicon wafer production line in the world.

Whether it is in terms of production speed or yield.

"Okay, this time we will trial production for ten days, and then we will test all the silicon wafers produced in the past ten days to determine our final effect!"

"it is good!"

Everyone cheered.

So in the next ten days, their production line began to run at full speed, and the power of almost all machines was turned on to the maximum.

To their surprise and helplessness, due to Lin Xiao's optimization of the purification process, their production speed of primary silicon wafers increased by more than 30.00%, and this made their polishing machines somewhat insufficient.

They have to buy a few more polishing machines to maximize the productivity of this production line.

Of course, these things will wait until later, and they will complete their current ten-day test first.

In this way, time passed quickly.

Lin Xiao naturally did not stay here all the time, but returned to Shangjing University.

It just so happened that it was the graduation season of the senior year, and the senior students were going to defend their thesis, so he also served as a defense review teacher for a while.

Although it is Beijing University, the quality of graduation thesis is also uneven.

Of course, if you can pass it, you can pass it. As a young man, Lin Xiao still understands these young students very well, although he is not a person who has experienced it—after all, his undergraduate graduation thesis can be directly published in top international journals.

However, after all, it was Beijing University, and some of the students' papers showed a high level of quality, which was praised by him.

All in all, his defense team has basically passed everything that can be passed. Except for a few students whose thesis was severely criticized by several other reviewers, he has no objection.

Well, anyway, the students in his defense team are very grateful to him.

As for the students in other groups, that's out of his control, so let's hope for luck.

In this way, time passed quickly, and ten days passed quickly.

The ten-day trial production test was successfully completed.

The final test results surprised each of them.

As long as the number of polishing machines keeps up, their production line capacity will reach the world's top level.

At the same time, considering the cost of raw materials, electricity costs, transportation costs, etc., they will only be lower than competitors. After all, Huaguo itself has enough raw materials. Compared with the fact that Japanese raw materials need to be imported from abroad, Huaguo China is in an absolute advantage, and the unit price of industrial power in Huaguo is also on the low side in the world, while the unit price of power in Japan is nearly twice that of the former.

All in all, Huaguo's various costs are in an advantageous position, plus the world's major chip foundries are close to Huaguo, such as TSMC and UMC in Taiwan Province, Samsung in South Korea, and Huaxin in Shanghai. International, Hua Hong Group.

Therefore, as long as they can build enough production lines, there is only one result - winning hemp.

And this news quickly attracted the attention of the above.

In just a few days, the central government issued documents and issued instructions to build high-tech silicon wafer production lines as soon as possible, provide low-interest or even interest-free loans, and stimulate relevant domestic manufacturers to build new production lines.

So far, the clarion call for the first large-scale attack on the semiconductor industry chain has sounded.

Among them, Lin Xiao's Dingguang Technology Company is the "military adviser" in this attack.

　Answered it!
　　Finally relieved.

　　In the near future, it may be due to the final preparations for graduation, such as the class dinner the day after tomorrow, and the update may not be stable. After everything is over, it will return to normal, and the chapters that were owed before will be added.

　　Thank you for your understanding.

　　
　
(End of this chapter)