After visiting Beihai Park, half a day of the National Day holiday had passed. At noon, Zhou Yan and Qin Ruoshu took their best friends and classmates to experience some private dishes near Nanchizi Street.
"Why do I feel like there's nothing special about this private kitchen?"
"There are many rich people in the capital and few places to spend money. That's why there are these so-called private restaurants. If you want to eat authentic meals, you still have to go to those time-honored restaurants, such as Fengzeyuan, Yuhuatai, and Hongbin
Buildings and the like.”
"Old Qin, you sound more and more like a landlord..."
Qin Ruoshu retorted: "You heartless people eat my food, drink my food, and laugh at me to see if I..."
As he said this, a group of women got together and attracted the surrounding tourists to stop and eat melon.
"Okay," Zhou Yan quickly pulled his girlfriend away, "I'm not afraid of other people's jokes. At noon, let's go to Shichahai to make things happen. In the afternoon, let's go to the Forbidden City?"
"It all depends on Teacher Zhou's arrangement..."
There are only eight of Qin Ruoshu's best friends and male companions, and one apartment in the courtyard house in Shichahai is enough for them.
However, just as the group was settled, Zhou Yan's phone suddenly rang.
The caller was Xu Chongsheng: "Mr. Zhou, CSR Zhuzhou Tram Station sent a fax, saying they would come over to visit our IGBT chips."
"IGBT?" Zhou Yan laughed dumbly, "I remember I just handed over the information to you, and are you applying for a patent now?"
"Yes," Xu Chongsheng also felt a bit dumbfounded, "The patent application acceptance notice has just come out..."
"In that case..." Zhou Yan looked back at Qin Ruoshu, who was guarding the side, "Wait a moment, I will rush over right away..."
"Brother, is there something important?"
"That's right!"
IGBT, the full name is Insulated Gate Bipolar Transistor, which is an insulated gate bipolar transistor. It is a composite fully controlled voltage-driven power semiconductor device composed of a bipolar transistor and an insulated gate field effect transistor.
In layman's terms, this thing is a switch that can control a high-voltage circuit through a low-voltage circuit.
Although the IGBT circuit is very simple, it is an essential component for electric drive intelligence, especially for electric vehicles and high-speed rail.
You can imagine that if there is no IGBT driven by the automatic driving system, the owners of electric vehicles and the drivers of electric vehicles will still need to pull the switch manually when starting the car. It is funny to think about it.
"It should be soon," Zhou Yan stretched out his hand to stop his girlfriend's waist, "I'll ask Xinghan to lend me a driver later..."
"Oh well!"
Less than three minutes after hanging up the phone, Xu Chongsheng's car arrived.
"Mr. Zhou, the newly established electric vehicle project team has applied for a patent according to your requirements. There should be no problems with our technology, right?"
"What's the problem?" After getting in the car, Zhou Yan pulled on his seat belt and fastened it, "Go to Xinghan!"
After getting on the road, Xu Chongsheng looked at Zhou Yan with a smile while driving: "I heard from the person in charge of the electric vehicle project that this IGBT is actually a triode plus a thyristor. But according to the news I know, CSR needs
The voltage of the IGBT should not be less than two thousand volts..."
The IGBT data Zhou Yan received from the system covers voltages from 300 volts to 11,000 volts, and power ranges from 300 watts to one megawatt.
As for Xu Chongsheng, the IGBT data only ranges from 300 volts to 600 volts. After all, 600 volts is enough for a mere electric car.
However, although he has information on IGBTs with voltages above 600 volts, Zhou Yan is not sure whether chip companies have semiconductor materials that can carry high voltages.
Not long after the car left Shichahai, Zhou Yan took out his mobile phone from his pocket and called Han Zhengjun, the boss of the semiconductor company.
"Old Han, are there semiconductor materials in our laboratory that can carry a voltage of six thousand volts?"
"Yes, the six-inch silicon carbide project we are working on is enough to carry a high voltage of 10,000 volts!"
Zhou Yan breathed a sigh of relief: "Is it in stock?"
"I'll get ready right now!"
When the two arrived at the semiconductor company's laboratory, which was heavily guarded, Han Zhengjun was already waiting at the door.
"Mr. Zhou, Mr. Xu, please come here!"
Naturally, it is not easy to enter a high-standard laboratory. Not to mention identity verification, it took three people more than half an hour to decontaminate and put on dustproof clothing before entering the laboratory.
This was Xu Chongsheng's first time entering a semiconductor laboratory. As soon as he walked in, he was overwhelmed by the various advanced instruments in the laboratory...
After Han Zhengjun led the two of them around the laboratory, they came to the chip processing area.
"Dr. Jay, what is the manufacturing process of the chip you need to process?"
"A combination of transistor and thyristor," Zhou Yan touched his nose, "I will give you the schematic diagram, performance parameters and process roadmap in a moment. Please help your people make a set!"
"OK!"
After walking around, Han Zhengjun took the two of them to his office and gave up the computer.
Zhou Yan sat down in front of the computer, started the super software, and started working hard.
The first time he saw Zhou Yan's busy Xu Chongsheng, he was a little surprised. In his impression, Zhou Yan was just a tool person responsible for "transporting" information.
"Lao Xu, are you a little surprised?" Han Zhengjun smiled coquettishly, "According to Chief Engineer Li, our Director Jay Chou is involved in a certain industry, and he should have a lot of professional knowledge in this industry..."
Xu Chongsheng's eyes lit up: "Then you haven't thought about leaving Director Jay in the laboratory?"
"Why haven't you thought about it?" Han Zhengjun smiled helplessly, "You should know Jay Chou's catchphrase, right?"
"I need to do all the work myself, why do I need your subordinates?"
"Oh, by the way..." Han Zhengjun approached Xu Chongsheng, "Dr. Zhou is so anxious to come here this time. What's the urgent matter?"
"A while ago, Qingyan applied for a batch of electric vehicle patents, which alarmed CSR Zhuzhou Electric Locomotive..."
"IGBT?"
Although Baize Semiconductor's main business is chips, Han Zhengjun is no stranger to coupled transistors such as IGBTs.
Turning around, he glanced at Zhou Yan who was typing up information, and smiled slightly: "Dr. Jay has a lot of skills in his pocket!"
Thinking of the students Zhou Yan threw out in order to "seduce" him during the interview, Xu Chongsheng nodded in agreement.
"By the way, I don't know about Qingyan Group yet..."
"Steel, machinery, automobiles, including electric vehicles..." Xu Chongsheng looked back at Zhou Yan as he spoke, "And aerospace..."
The two of them were chatting lively here, while on the other side, "Octopus Monster" Zhou Yan, who was running at full speed, was very busy.
Fortunately, the process of IGBT transistors is relatively simple, and the real technical difficulty only exists in the semiconductor substrate and packaging that carry high voltage.
Zhou Yan spent two hours taking the information out of his head.
"Old Han, let the people in the laboratory make an 800-volt test first!"
The processes are all ready-made, and the semiconductor laboratory is not short of materials. More than an hour later, an IGBT with a voltage of 800 volts and a power capacity of 40 kilowatts was released.
It was sent to the electrical laboratory and after testing, the performance fully met the expected design requirements.
Then, Zhou Yan, Han Zhengjun and Xu Chongsheng stayed there until after eight o'clock in the evening, waiting until a series of transistors were all packaged and tested before they went back to their respective homes...