Chapter 850: If you want someone, you still have someone to ask for money (there are only 4k today, see the end of the chapter)
For Director Li, it is difficult to solve the problem of shutting down. They have considered it. And I would like to solve this problem. But the problem is that they tried their best to achieve this effect, either new materials or new structures, or even completely different from SCR, which is beyond the limit of current capabilities.
But unexpectedly, General Manager Gao broke the whole into zero, and the multiple interspersed changes solved the problem of too deep SCR saturation.
Is this the combination of command technology and science and technology? It's so scary...ahem.
Gao Zhendong had served as a soldier and was also a grassroots commander. It was not a secret among several familiar ministries and commissions, and he added a halo to him.
After listening to Director Li's words, Gao Zhendong smiled and said, "Haha, you didn't think about this. It is probably because of the limitations of processing technology, which makes you dare not think about this."
This method can solve problems and solve big problems, but there is a problem. In the context of the current SCR technology processing technology, the comrades in the 16th Research Office cannot come up with a process that can create this structure. .
The multi-cathode structure of GTO has a cathode number that is not ten or eight, but is so numerous that it can be thousands. Thousands of cathode units are processed on a silicon wafer, far exceeding those of the 16th Room comrades. I can't even think about my ability.
"Hehehe, Chief Engineer Gao, you are saying good things for us. To be honest, the main reason is that the theoretical foundation is not enough. You cannot consider that this structure can reduce saturation, and you cannot consider that you cannot consider that you cannot consider that you can reduce saturation. Critical conduction can also work normally."
As for the criticality, if you understand it, it means being on the edge. Under normal circumstances, you will definitely hide as far as you want.
It is only with the advancement of technology that engineering and technical personnel will even actively pursue this critical state or even work in a supercritical state, but only use other means to restrain them.
In the aerodynamic design of fighter jets, one of the typical characteristics of third-generation aircraft, static and unstable is such a type of thing. Relying on powerful flight control, aircraft that are in an unstable state in aerodynamic design can fly normally.
Comrade was carrying out self-criticism and reflection, so Gao Zhendong naturally couldn't say anything. He just expressed the shortcomings of this device according to his own conventions. "But compared to SCR, GTO is not without its shortcomings." Gao Zhendong said.
All comrades have prepared this point, and there is no free lunch in the world. "The first disadvantage is that the structure is much more complex and difficult to process than SCR. Fortunately, there is no problem now. Our semiconductor processing technology, the most troublesome multi-cathode in GTO processing, is currently our semiconductor processing technology, and the most troublesome multi-cathode in GTO processing. The processing is a very simple thing."
Everyone understood that it was because the integrated circuit processing technology you created, which was more micro-carving than micro-carving, so it was naturally no problem. .
Even the 10 micron process that has been disclosed far exceeds the practical requirements of GTO.
The reason why Gao Zhendong only started power electronic devices after the lithography machine and corresponding processes were improved is also one of the reasons. Good goods are very demanding!
The several devices he likes are all with superior performance but complex processing. They do not have a lithography machine, but they are not very fun. GTO originally began to appear in the mid-to-late 1960s, which is one of the most fundamental reasons, because at that time, the earliest practical lithography machine was launched. Without this thing, GTO processing was not that convenient.
Although Gao Zhendong always had 7nm5nm2nm in his previous life, putting aside these things, not to mention playing word games, in fact, in the world of semiconductors, 28nm or above is enough to do a lot of things. "Well, as for the rest, I won't talk about some of the shortcomings of the details. The second biggest and most obvious disadvantage is that its ultimate power is one order of magnitude lower than SCR." >
When I heard Gao Zhendong's words, everyone didn't take them seriously. Hi, what a big deal. After all, power can be obtained in parallel, but the working frequency is a problem in the womb. No matter how it is serialized, it will not be able to go up.
This is like Gao Zhendong's previous life. When the CPU frequency was developed to a bottleneck, everyone started to play with multi-core. If you can't go up the frequency, you can't go up, so put together more functional units.
Blue Factory: Multi-core glue is also multi-core.
"This is not a big problem. The power problem can be solved through parallel connection, and basically does not cause much trouble. Moreover, under very special requirements, you can also use a little SCR, but from a wider range of things In terms of scope, the biggest problem with GTO compared to SCR may be that it is expensive. "
The GTO has not started yet, and Director Li is already imagining the future.
The processing is complicated, so the cost is naturally higher.
Everyone laughed after hearing what he said.
Gao Zhendong smiled and said, "But don't worry, in fact, in the range from a few Hz to tens of kHz, except for the range below hundreds of Hz, and up, the power of SCR is not as good as GTO at the same operating frequency, and When it reaches 10kHz, it has reached the restricted area of SCR. It cannot work at all. "
This actually means that although the SCR limit power is higher, the working frequency is slightly higher. Its power performance is not as good as that of the GTO.
For the comrades in the 16th Research Office, when they heard this, their eyes lit up and they quickly wrote it down.
In addition to their open knowledge, they also learned another implicit content - if you do SCR, don't consider getting above 10kHz, don't waste that much effort. This thing can't reach that level at all. Yes, no treatment.
Although this was brought out by Gao Zhendong inadvertently, it was like a treasure for comrades who were engaged in SCR, and clearly gave extreme conditions to avoid detours and avoid wasting resources.
After all, although GTO is good, SCR is cheap, and it is impossible to just throw it away. Moreover, while SCR is cheap, it also has very clear advantages.
SCR and GTO are both thyristors, so they both have the advantage of a thyristor, that is, their high voltage resistance!
The voltage withstand level of the two is the same. It is the highest among all commonly used power electronic devices until Gao Zhendong travels through. In fact, the power is the highest.
What's even more amazing is that as the current rises, the withstand voltage value of all devices will drop, but the turning point of the decline of these two brothers is the latest!
The value of GTO is here. This product has outstanding advantages, a wide range of application, relatively simple structure, and not too high cost.
For SCR, this can also be said to be a trick that can be eaten all over the world. I am cheap, high in power, and high in voltage, and you can't accept it.
Gao Zhendong then broke the doping of each layer of GTO, related characteristics, parameter items, switching process, precautions, etc., and explained it to the comrades in the two units one by one. , I heard the comrades dancing, this thing is great!
As for how Chief Engineer Gao can know so much before he has finished the things, don’t ask.
For the comrades in the 16th Room who already have SCR experience, this thing is not only free to pick it up, but it is not much different. The biggest craftsmanship problem has been led by Chief Engineer Gao with 1,761 and 1,274 factories. The comrades who have solved the problem are suitable for crystallization, doping, diffusion, photolithography...
What they have to do is to transform what Gao Zhendong taught them, combined with these excellent conditions, into Specific production process.
If President Gao had to do this, they would just pee and drown themselves and would not be able to lose face.
Director Li looked at his many pages of gains and discussed with Director Pan and his team of 1218. "Director Pan, General Engineer Cui, GTO, we are more theoretical and you are more productive. What do you think? This can combine the advantages of our two units to make the things the fastest and best Come out."
Director Pan nodded: "Well, it's good to use this to play to your strengths and avoid your weaknesses. We can afford to delay it, but there are thousands of substations, tens of thousands of electric motors, and countless industries in China They can't afford to drag the power supply."
Gao Zhendong smiled: "Well, yes, our steel plant has a very urgent need for high-power DC power supply, so I'll ask you all to do this." >
Electric furnace steelmaking can be said to be the most urgent and important demand for high-power DC power supplies.
When Gao Zhendong was engaged in ESR, he had to install a low-voltage high-power DC power supply first, otherwise the electroslag remelting would not be possible.
It's just that the product that uses mercury arc rectifiers, the volume, weight and cost are hard to describe. The most important thing is that the performance is just enough. There is no way. That year we even had SCRs. I didn't understand much, and the high-powered ones were even more mirage.
Gao Zhendong's words made the comrades feel that the burden on their shoulders was heavier. Look, even Chief Engineer Gao is so urgent.
It's just that in a trance, they think there's always something wrong with this. When someone who has such a high level of attainment in semiconductors, electronics, and computers says, "our steel factory", everyone will think that The taste is wrong.
Leader of the Twelve Ministry of Machinery: Be content. If our department hadn’t tried every possible way, you wouldn’t have the chance to listen to this.
Director Pan was still unsatisfied: "General Engineer Gao, you see, we organize the research on MOSFETs in this way, what do you think?"
No mistakes, one song, one content, one Read it in 16, 9, book and bar!
He didn't mention this, and it was easy for General Engineer Pan and Director Li to take the initiative to mention it.
MOS and FET are concepts that have been established long before Gao Zhendong came over, so Gao Zhendong simply continued to use these abbreviations for convenience.
The advantages of Room 16 in this regard are very obvious. Although they are engaged in SCR, they are definitely better than their 1218 semiconductor design. If they get the MOSFET project in their factory, if Room 16 is helping, it will definitely be It is like a tiger, things are important. It is impossible for one's own factory to finish so many new devices. Even if you can eat them, there is a limit. These new devices are far more than the appetite of one's own factory. Director Pan knows how to integrate them. resource.
Even if he didn't say it, Gao Zhendong had this idea, but when he saw that he took the initiative to propose it, he happily agreed. "Well, this is a good idea. Then you guys will continue to come tomorrow. I will give you some MOSFET content." There are a lot of contents in GTO, and they came here in the afternoon. This half day is enough to teach a GTO, but none of them are Superman. Even if you just recite the GTO, it is enough to recite it for an hour or two, not to mention explaining and answering questions.
Director Li was overjoyed, did he actually have it?
Although it was already afternoon off work, Director Li didn't even go back to his home and rode his bike straight to the unit.
As he expected, the dean was waiting for his result at the unit.
"Old Li, how is the situation?"
Director Li gave his notebook to the dean: "Very good, a big job! I'll go there tomorrow, and I'll still have to go there. There is something, and the comrades from 1218 are about to bring us together. "
The dean quickly browsed it and slapped: "Good things, really good things! The comrades from other laboratories are blessed." As a comprehensive compound in this area, the Electronics Institute has departments that engage in transmission and transmission transformation, motor dragging, etc. The director can see at a glance how much Director Li has gained today.
Motor dragging is also one of the professional courses in major electronic engineering majors, and it is particularly important to be in this year.
He raised his head: "We will put this matter on the top priority in our yard. If you want people, I will give them to them! If you want money, I will give them to them! If you want resources, I will give them to them!"
There is only people, right? Director Li was amused and crying, but it didn't matter: "Just someone is enough, the department will cover all the funds, and we don't have to worry about the amount."
This is another benefit of working with Gao Zhendong, and the funds are guaranteed. Very good, adequate and stable.
In this matter, the comrades from the Twelve Ministry of Machinery have no complaints or dissatisfaction with Gao Zhendong, a "outsider", who was treated so favorably.
If you have his ability, you can do this too.
Twelve Machinery Department: Do you think his funds are only paid by me? childish! ——
In a certain place in Beijing, some statistical data for various industries in the six months have been raised. As an important statistical node, the six-month data for various industries is very important.
The leader was very happy with a statistical data.
"Well, this year's data has been counted very quickly, more than a month earlier than last year."
The faster you get the data, the earlier you analyze and adjust, and the more beneficial it is to work. "Yes, the leader, with new technologies such as computers, remote data communications, and databases, our statistical work this year is indeed much more convenient and quick, and it is expected that this will become a normal situation, not a flash in the pan. Our medical and health care work is indeed much more convenient and fast. Fortunately, the comrades in the economic department, especially those responsible for statistics, praised this. "
The statistics of the Ministry of Medical and Health are statistics, and the statistics of the economic department are also statistics. Both are still Those who have business dealings and contacts know a little about the situation, and leaders who come to report it have also heard of it.
"Very good, very good. Our comrade in the science and technology front has made great contributions."
After saying that, he looked down at the materials in his hand. This one was from the Ministry of Health and Health. of.
As he looked, he frowned. "Are there any statistical problems with your data? Are you seeking truth from facts?" he asked. "Chief, we have strictly investigated and verified these numbers. The data starts from the grassroots level and is well documented and traced along the way." The comrades who reported were very sure that these data were all experienced. It's a test. "Well, that's it, then do you see if there is any problem with this data?"
The leader pointed his finger at a column of data, "The number of new medical workers added."
(This chapter ends)