Chapter 118 11N polysilicon is officially released!
"Has the registration of Longxing Chemical been completed?" Chen Xing muttered while sitting in the office.
Longxing Chemical and Longxing Silicon submitted their applications at the same time, but due to the different attributes of the companies, the former had to undergo multiple reviews.
After all, it is a chemical enterprise, and the qualifications must be reviewed clearly.
But now an embarrassing thing has happened. Chen Xing has technology but no production equipment, and Longxing Chemical is just a decoration.
I want to borrow it...
Dragon Kingdom really doesn’t have one!
Let alone photoresist companies, the photoresist formula is still a mystery.
“Forget it, let’s put the recruitment of photoresist talents aside for now, let’s go to the silicon wafer factory first to see how it goes.”
Chen Xing stood up and said.
There is no equipment and it is useless to ask for help.
A few days have passed since the "Alliance Meeting". According to what Wei Hua said at the time, polysilicon growth takes about a week.
It's almost done now, and he plans to go over to inspect the progress.
As for Longxing Technology Company, the matters that need to be dealt with have been completed.
The second batch of brilliant X1 components, including Carl Zeiss lenses and Korean Star M7 screens, have been shipped to the Guancheng assembly plant.
It is expected that the pre-sold brilliant X1 will be shipped within five days.
......
When Chen Xing drove to Tengfei Industrial Park, Lin Tian, who was dyed yellow hair, walked out of the exit of Shenzhen International Airport in a leisurely manner.
“Ah!”
“A familiar city!”
He couldn't help but sigh.
However, the temperature was still less than 7 degrees, and his weird outfit of ripped jeans and a black down jacket made many people in the airport pick-up hall look at him.
Lin Tian still went his own way. Just when he was about to leave the airport and go to Longxing Technology Company to talk to Chen Xing about the photolithography factory, his eyes were attracted by a red-haired figure.
Long burgundy hair, skin that can be broken by blows, long legs that are longer than life, and the most important thing is that she is a foreign girl.
He didn't hesitate for a moment, immediately approached to strike up a conversation, and said in fluent English: "oi! Excuse me, you are the most beautiful foreign girl I have ever seen, can I get to know you?"
"Of course..."
Martina was about to say, of course, but she choked back the words.
Lin Tian’s image can be said to be bad in every aspect. He looks like a gangster with his dyed yellow hair, and his clothes are not good. He also wears ripped jeans in winter, and the proportion of width at top and narrow at bottom is very bad.
And she's still thin...
If Martina hadn't received professional training, she would have wanted to ask: "Can you do it, a thin dog? Imitate how others strike up a conversation?"
However, because of her training, the disgust in the depths of her pupils was fleeting, and she immediately pretended to be flattered and thanked her: "Really? Thank you, you are the first person from the Dragon Kingdom to compliment me on my beauty."
"Has anyone ever said your eyes are beautiful?"
"Not yet..."
"It's like a sapphire."
"Thank you You, you are also very handsome, and I really like your dressing style, it’s just...well...very individual and special."
"I think so too, are you waiting for a friend now?"< br>
“Yes, he should be arriving soon.”
“Then he hasn’t arrived yet. There is a good restaurant nearby. Why don’t we go have a meal first and I will show you around? By the way, let’s talk about the philosophy of life.”
Martina: “…”
Listening to Lin Tian’s naked and frank conversation, she was really convinced. Why doesn’t this guy still? Let's go, if it weren't for the fear of exposing her identity, she would have killed this guy.
She talks about eating and ideals. Do you really think she doesn't know what Lin Tian wants to do?
She really has no interest in such a tight and thin dog.
"Martina."
When she was thinking about how to get rid of the "strike-up", the contact person finally arrived and glanced at the energetic young man Lin Tian.
"Who is this?"
The foreign man looked at Lin Tian and asked.
The words just fell.
Lin Tian's expression suddenly changed, and he chose to run away without waiting for Martina's introduction. He found that both of them were wearing wedding rings, chatting up girls and even wives...
Looking at Lin Tian running away, the foreign man winked, put his arm around Martina's shoulders and returned to the car in the parking lot, like a loving couple.
But when they came to the parking lot and got in the car, Martina changed her weak demeanor and her eyes became cold and said:
"How is the Qingzhou chip check going?"
"No results yet."
The foreign man responded with an anxious tone.
"Trash, I couldn't find out after searching for so long. You have been here in Shencheng for so many years. You are really a trash!"
"Yes..."
Foreign men don't Dare to refute.
If anyone witnessed this scene, their jaw would definitely drop.
Why are the couple loving each other one moment, and then exchanging harsh words the next moment? The two of them don’t look any sweeter at all?
"Give me the information you collected."
As soon as Martina finished speaking, the foreign man immediately found a document, handed it to the back seat and said, "This is Longxing Technology Of all the information, I only collected this much.”
After flipping through a few pages at random, Chen Xing's photo appeared in the document. Martina remembered it silently and then turned to the next page.
Her eyes kept scanning the information, like a scanning machine scanning, while the foreign man started the vehicle.
……
The other side.
Tengfei Industrial Park.
Inside the steel structure factory building of Longxing Silicon Industry.
Silicon wafers are still being produced in an orderly manner. The silica is poured into the graphite submersible furnace for smelting and purification. The silicon ingots are piled next to it, and from time to time someone takes them for secondary purification.
Chen Xing walked into the silicon industry factory and went straight to the polysilicon production furnace.
"President."
"President."
Along the way, people kept saying hello.
Han Ming, who was still checking the equipment growth data, heard the noise and looked towards the entrance. When he saw Chen Xing coming, he quickly stepped forward to greet him: "President, you are here!"
" "Yeah."
Chen Xing responded calmly, looked at the polysilicon growth furnace and said, "Wei Hua said that polysilicon production takes time. It's been a week now, let me see how it goes."
"What a coincidence."
Han Ming smiled and responded: "With the current growth progress, it is expected that we will be able to take out the polysilicon rods in two hours."
"How much has accumulated? How heavy is it?”
“It’s about 100 kilograms!”
“I’ll wait here.”
“Well, sit here, CEO.” >
...
Two hours flew by. When the polycrystalline silicon growth furnace equipment values showed that the polycrystalline silicon rods had accumulated 100 kilograms, the equipment operator also began to turn off the heating of the equipment.
Other talents from the silicon industry factory are also coming here one after another.
There is currently only one production line, and they all want to see with their own eyes whether the purity of the polysilicon this time meets the standards.
Between polycrystalline silicon and monocrystalline silicon, there is only one smelting missing. Its purity is directly related to the purity of monocrystalline silicon, so it must reach 10N or above, which is more than 99.99999999%!
“The temperature in the furnace begins to cool down!”
As soon as Han Ming finished speaking, the equipment operator immediately repeated: “The temperature in the furnace begins to cool down!”
Because the polysilicon production environment is At 1100 degrees, if you want to take out the polysilicon rods, you still need to wait for the growth furnace to drop to the appropriate temperature. A few more hours have passed, the sky has gradually dimmed, the temperature of the polysilicon growth furnace has also dropped, and the equipment operator began to control the machine to take out the polysilicon rods.
Seven p.m.
A total of four polysilicon rods weighing two hundred kilograms were taken out!
Han Ming couldn't wait any longer and knocked down a fist-sized piece of polysilicon for testing. Another golden purification talent, Wei Hua, came to Chen Xing and explained:
"If the purity of polysilicon can reach 10N If so, then we can proceed to the next step, the smelting and doping process."
The words just finished.
Chen Xing's eyes flashed with confusion, and he humbly asked for advice: "Doping? Isn't it necessary to maintain the purity of single crystal silicon?"
Wei Hua told him at the beginning that silica Purification is to remove impurities, and then purify them multiple times to make the silicon wafer infinitely close to zero impurities. Why does it need to be doped now?
"President, please wait for a moment."
Wei Hua does not understand smelting and doping, he is just a purification talent, but he does not understand, does not mean that others do not understand.
He trotted all the way and brought Zhai Yong, a golden quality doping talent, to Chen Xing and said: "Gong Zhai, please explain to the president why doping is needed in the production of semiconductor silicon wafers."
"Ahem."
Zhai Yong coughed twice, looked at Chen Xing and explained patiently: "This doping is different from ordinary impurities. The impurities we remove are usually ferric chloride, aluminum trichloride, silicon tetrachloride, that is, iron and aluminum Elements, and doping is phosphorus, boron, antimony, arsenic and other substances..."
"Let’s talk about phosphorus first. It is a pentavalent dopant, usually used in N-type (negative-type) In the preparation of silicon crystals, phosphorus doping can introduce additional free electrons, thereby increasing the conductivity of silicon. "
"Boron is a trivalent dopant, usually used for P-type (IE type). ) Preparation of silicon crystals. Boron doping introduces additional holes (electron defects), thereby increasing the electron hole conductivity of silicon. "
"Also, antimony and arsenic are pentavalent dopants. It can be used to prepare N-type silicon crystals, and the effect is similar to that of phosphorus."
"That's it."
Chen Xing nodded slightly, suddenly realizing.
No wonder, Shanghai Silicon Group cannot produce 12-inch semiconductor silicon wafers. It is likely that it does not understand doping technology.
In the semiconductor chip production process, there is really no simple step, and all require the accumulation of technology.
Silica to silicon ingot, silicon ingot to polysilicon, polysilicon to doping, after doping it is to pull the single crystal silicon rod.
Every step may go wrong, and every step is a difficulty that needs to be overcome. Fortunately, Chen Xing's most important thing is technology.
After Zhai Yong finished explaining the smelting and doping, Han Ming also finished testing the purity of polysilicon, and excitement was written all over his face.
"Hahaha, 11N purity, this piece of polysilicon has a purity of 11N. We have produced 11N purity polysilicon for the first time!"
He held the half piece of polysilicon, some Crazy came to Chen Xing.
11N purity, this means that the purity of this piece of polysilicon is 99.999999999%, a full 11 nines!
Polycrystalline silicon is 11N, which also means that monocrystalline silicon will also be 11N, as long as they can be successfully smelted and produced.
This is equivalent to laying the foundation. If the quality of polysilicon is not up to par, the quality of monocrystalline silicon will definitely not be up to par, because the next step is smelting and doping, and there will be no subsequent purification. What is the purity of polysilicon now? The purity of the produced monocrystalline silicon wafers is determined by the purity.
"Really 11N?"
Chen Xing was delighted and asked quickly.
11N polysilicon has been produced, is it still far away from the production of 11N monocrystalline silicon?
In other words!
Is it still far away from semiconductor silicon wafers?
“It’s absolutely true!”
Han Ming couldn’t hide his excitement, and nodded again to confirm.
Next second.
The surrounding engineers were also excited.
“Hahaha, good!!!”
“After 11N polysilicon is produced, the next step is to smelt and dope it, and then pull the single crystal silicon rod away from our semiconductor silicon wafer One step closer!”
“Wei Gong and Han Gong are so awesome, their purification technology is really incredible, awesome!”
“The purity of 11N polysilicon means that 11N is The purity of single crystal silicon is now waiting for smelting and doping!”
“God is blessing us”
"Now let's look at Zhai Gong's doping!"
The people here are all silicon industry talents. They all know the production steps, but they don't know the specific operation methods.
Since it involves smelting and doping, Zhai Yong naturally does his part.
He took a step forward and asked for instructions: "President, now that 11N polysilicon has been produced, should it be smelted and doped immediately?"
"Doped immediately!"
Chen Star replied in the affirmative.
The sooner 12-inch semiconductor silicon wafers can be produced, the better. Only by solving the problem of raw materials can we officially get rid of dependence on imported materials.
Following Chen Xing’s order, Zhai Yong raised his voice several times and greeted: “Brothers, put the polycrystalline silicon rod into the quartz crucible, and we will use the Czochralski method to take out the single crystal silicon rod!”
The current mainstream method for removing single crystal silicon is the Czochralski method, also known as the Czochralski method and the Czochralski method.
Of course.
There is also a floating belt method, also called zone smelting method.
However, the advantage of the Czochralski method is that it can be doped directly in the quartz crucible, and the effect will be better than the floating belt method.
Now that the next step has been determined, the blue quality workers are also confident and responded loudly.
“Let’s do it!”
“Be careful when transferring the silicon rod, don’t drop it on the ground!”
“Brace yourself, cheer up!”< br>
No one dared to slack off. They controlled the equipment to clamp the polysilicon rod and slowly put it into the quartz crucible.
The quartz crucible smelting furnace has a long strip inside, about seven meters long, which can perfectly accommodate polycrystalline silicon rods for smelting.
The melting point of quartz is 1700 degrees and the melting point of silicon is 1400 degrees. It only needs to be heated to 1450 degrees to maintain it.
As the temperature of the quartz crucible rises, the polysilicon rod gradually melts and changes from solid to liquid.
At this time, Zhai Yong began to dope it himself, adding phosphorus according to the expected proportion to increase the conductivity of silicon.
The process of smelting and mixing lasted for several hours. It was like making soup and the chef kept adding ingredients.
Even though it was already early in the morning, Chen Xing did not feel sleepy at all, but became more and more energetic. Han Ming beside him kept explaining:
"Now Gong Zhai is still preparing the silicon solution. , because we are starting from scratch, we need to pull up several seed crystals first. The seed crystals are simply thin rods, and we use them to pull the big rods.”
As expected.
In the middle of the night, Yang Lie, a talented person with large-size silicon ingots, took over the work.
He first used a small quartz crucible, filled some molten silicon liquid, poured it into the grinding tool, and cooled it to make the seed crystal for pulling.
In the early morning, the production of fine seed crystals is completed, the temperature in the furnace is slightly lowered, and the prepared seed crystals are put in.
When it was immersed in the silicon solution, high-frequency slip dislocations occurred in the crystal due to thermal shock. Yang Lie did not hesitate for a moment and immediately controlled the machine to rotate and pull.
After lifting 10CM at high speed, he immediately slowed down the lifting speed.
Chen Xing knows very well that with the ability of golden-quality talents, this is definitely not a mistake, and may be the key to producing large-size silicon rods.
Modulate the direction of rotation.
Set the pulling speed.
After debugging the equipment parameters, Yang Lie immediately came to Chen Xing and said:
"President, why don't you go take a rest first, because what we are going to do is 12-inch silicon wafers, silicon rod size It’s about 14 inches. If we estimate the current speed, it may take about eight hours for the silicon rod to be fully produced!”
“No, I want to see it with my own eyes”
Chen Xing shook his head.
He could afford to wait for just eight hours.
The birth of this big silicon rod is directly related to whether the dark child of Loongson International can continue to hide. How can he sleep?
If the 12-inch semiconductor silicon wafer comes out, the road to domestic chip production will take another step, and silicon wafers will no longer rely on imports.
If you want to realize the localization of 12-inch semiconductor silicon wafers, it depends on the quality of the big silicon rod being pulled!
(End of this chapter)