Chapter 271 Follow me and get another crystal?
Before everyone finished admiring it, Gao Zhendong nodded to Yu Yuncheng, and Yu Yuncheng gave the instruction: "Get ready, pull the second one!"
Considering that it should cool down completely, Many tests could not be done. After discussing with Yu Yuncheng, Gao Zhendong decided to do three tests at once.
This thing is not small in size, and it cannot be cooled down completely in a short time.
Simply take out three of them, and you can also test the repeatability of the corresponding process parameters of the single crystal furnace and single crystal silicon. You know, their single crystal furnace is not just going to do research, it is just to verify this. The feasibility of the route is to verify the feasibility of mass production of monocrystalline silicon.
Once successful, this single crystal furnace will be mass-produced as a standard silicon single crystal production equipment. Naturally, the relevant test requirements are much more complicated and rigorous than trying to pull one out
Otherwise, with Gao Zhendong’s technology , coupled with Yu Yuncheng’s experience, it won’t take so many months.
Speaking of this matter, Yu Yuncheng couldn't help but burst into tears. Hao Heng, remembering how stretched he was when he pulled four 9-silicon single crystals. There was only one seed crystal. Once it failed, the next one would The funds have not yet been secured.
Look here again, I bought 3 pieces at once, and before the test, Director Gao even said, don’t be stressed, these 3 pieces will be scrapped, sum up experience, learn lessons, improve equipment, Adjust the process and pull again.
This is what it feels like to have your back against a big tree.
After listening to Yu Yuncheng's instructions, the entire project team quickly took action and rushed.
It will take a lot of time to pull down three wires, plus other preparations, tests, data recording, finishing work, etc.
Everyone even took turns to have a meal in the cafeteria while changing shifts. The laboratory has management regulations, especially during the official test period, you are not allowed to eat in the laboratory.
By the afternoon, the three silicon single crystal rods had been drawn. The first one had almost cooled down and was sent to the inspection room.
Gao Zhendong did not leave, and everyone in the research team was also in the laboratory. No one left. Although he was very confident, and the conditions given by Gao Zhendong were not a one-time deal, the results were about to come out. , still a little nervous.
They did not realize that this involved the creation of an industry. The most popular technological direction in the next few decades was laid by those black and shiny sticks just now.
Gao Zhendong is also a little nervous. This single crystal furnace was designed by him based on data restoration, unlike the DJS-59, which was produced by the system. However, what he showed on his face was that he was confident and confident. The wind is light and he looks calm and calm. He is the leader. The people below can panic, but he cannot.
His demeanor also relaxed the atmosphere of the entire research group. The boss is not panicking. Why are we panicking? Let’s learn from Director Gao and stay calm.
When it was almost time to eat, the first batch of data from the first silicon single crystal rod came back.
“It’s coming, it’s done!”
The team members who ran over with the data looked excited and waved a few pieces of paper in their hands.
Hearing the word "It's done", everyone relaxed completely. Although this is only the first batch of data for the first root, it already means that this step is stable!
Gao Zhendong stood up and stretched out his hand: "Show me."
He took the data from the team members, and put their heads together with Yu Yuncheng, line by line. He looked down.
"Impurity concentration, 3ppm! Haha." Yu Yuncheng laughed out loud. The most important indicator has been achieved.
The impurity concentration of 3ppm (one part per million) means that the purity of the silicon single crystal has reached 99.9997%. The proper 5 9 silicon single crystal has even begun to approach 6 9s!
This is several times lower than his initial goal: five nines. The impurity concentration has dropped several times.
For Yu Yuncheng, he couldn’t even think about it at first!
Gao Zhendong is also very happy about this. After all, he knows that this single crystal furnace is reliable, but he still doesn't know how reliable it is.
After all, design is design, and implementation is implementation. The design target is eight stories high, but the actual results are not uncommon in the basement.
Impurity concentration is very important for silicon single crystal. When making semiconductor devices, in order to obtain the required characteristics, when doping silicon single crystal, the commonly used doping concentration unit is ppma (one millionth atomic ratio). ), ppba (one billionth atomic ratio), the former is more commonly used.
From these two doping concentration units, we know how much impact 1ppm of harmful impurities has on semiconductor devices.
In fact, when technology developed to the point where Gao Zhendong traveled through time, the purity of silicon single crystal in the semiconductor industry was always 9 9s, and the limit could be 16 9s!
But now 5 9s can also be used, let alone the current "half-step 6 9s" product.
But it was not too early to be happy, they continued to read one by one.
"Crystal structure, no problem, the single crystal is not gone."
"Crystal orientation, no problem."
"Resistivity, within the expected range."
All the way From the looks of it, the two of them looked excited. I don't know anything else. At least for this first one, all the items that could be seen were completed.
As for other parameters such as oxygen content, carbon content, minority carrier concentration, and dislocation density, they are either still being measured or cannot be measured. However, none of this affects Gao Zhendong’s determination of one thing: at least this silicon single crystal rod will be fine!
Even if there is a problem with the last two wires, it doesn't matter. At least this one shows that there is nothing wrong with the stove itself, but our process and process are the problem.
To be honest, based on the time and cost invested in the single crystal furnace so far, even if this furnace was pulled into one piece out of ten, Gao Zhendong would praise it for its hard work. High success rate.
As the saying goes, there is no garbage performance, only garbage price.
Gao Zhendong and Yu Yuncheng looked at each other. He nodded and handed the test data to Yu Yuncheng.
Let him announce it. Although the single crystal furnace can be successful, Gao Zhendong himself is undoubtedly the core and most important reason, and he deserves the first credit. Without the design, theory, and data he came up with, this thing would not have been possible, or the speed. Not so fast, not so good in performance.
But in terms of fatigue level, Yu Yuncheng should rank first, so let Yu Yuncheng have the honor of announcing success. This is what he deserves. As for Gao Zhendong himself, he does not lack this.
Yu Yuncheng raised the test data in his hand high and waved it in the air, his face reddish and his tone high-spirited.
“Comrades, I announce that after three months of our efforts, the universal single crystal furnace project has been successful!”
Why is it a universal single crystal furnace? Because this thing is designed according to the universal design, the single crystal used in the ruby laser is also pulled out of it.
Everyone suddenly became noisy, some cheered, some applauded, some laughed, some beat each other's shoulders and clapped their arms, well, no one burst into tears, that's not the case.
Looking at everyone's excitement, Yu Yuncheng asked Gao Zhendong: "Director Gao, what's the next step?"
Gao Zhendong thought for a while: "Well, today and tomorrow, please bring it with you They worked overtime to measure the parameters of these three silicon single crystal rods, so that we have a better idea."
Yu Yuncheng nodded in agreement, even if Gao Zhendong didn't say anything, he would have to work overtime to measure the parameters. After all, how could he endure until Monday?
“After the test, we will take a look on Monday. If all three crystals are fine, you write down a copy of the materials and we will make three copies. Then we will send one of the three crystals to the Chinese Academy of Sciences for identification and testing. Send seventeen machines for free, and get twelve machines for free.”
Yu Yuncheng was stunned by Gao Zhendong's generosity: "Send them all out? Don't you want to keep them?"
Gao Zhendong shook his head: "No! If we need to do experiments, just pull out two more. Anyway, The finishing work will take some time. The most important thing now is to let everyone know that we have this capability. "
If nothing else, Factory 1274 is waiting. Now, they have been waiting for the silicon monocrystalline and the silicon monocrystalline promised by Gao Zhendong to lead them to develop integrated circuits.
Yu Yuncheng thought for a while and then asked something that seemed to be disappointing: "What if only the first one succeeds?"
Gao Zhendong had already thought about it: "Then Send it to the 17th Ministry of Machinery! If you have two, just one from the National Academy of Sciences and one from the 17th Ministry of Machinery.”
Yu Yuncheng himself didn't think of this problem. After thinking about it, he realized it was true. He couldn't help but be secretly grateful for Gao Zhendong's attentiveness. Director Gao was such a considerate person.
When everyone had almost calmed down, Gao Zhendong smiled and announced a routine: Let’s go and eat! The canteen is ready.
Everyone burst into laughter, knowing what Director Gao is doing.
A group of people walked toward the canteen in a mighty manner, and the comrades who came and went started talking again.
“The guys in the research lab went to eat again?”
"Hey, it seems like another project has been completed. They are used to this."
"Thinking about it carefully, it seems that I haven't seen them having dinner together for a while, so I thought it would be impossible."
"No? You think doing science is just picking cabbages in the fields? My aunt's cousin's second aunt's sister-in-law's son-in-law is at the Beijing Steel Plant. I heard from him that if our factory hadn't helped their factory last year, a scientist would There are no projects yet.”
Upstairs in the factory office, Director Yang looked at a group of people in the research room below and smiled. This must be something again.
While eating, Gao Zhendong suddenly remembered something, and it would be best for Yu Yuncheng to help with this matter.
He picked up the cup, walked away from Yu Yuncheng, and then said: "Old Yu, the single crystal furnace is finished, help me get a crystal. I have thought about the technology, but I am too busy to do it myself. If you are interested, Let’s do it together.”
Yu Yuncheng nodded and agreed without saying anything: “No problem, but can we go back to Haihekou 1761 this time? I’ve been out for too long, haha.”
Gao Zhendong nodded: "No problem, it is a joint venture between our factory and you, just do it in your place."
Yu Yuncheng's suggestion played into Gao Zhendong's heart, and he planned to develop this crystal , has little to do with the single crystal furnace, but the conditions at 1761 Institute may be better.
What Gao Zhendong is preparing to do is something he has long wanted: the mercury cadmium telluride crystals he previously extracted from the line-scanning infrared thermal imaging camera.
(End of this chapter)