Xie Zhenhua smiled happily again.

Since yesterday to Jiuzhou Industrial Co., Ltd., Xie Zhenhua has been relaxed, even last night was almost so happy that he couldn't sleep, they feel that the very tricky IGBT import procurement matters, now is no longer a problem, has been successfully solved.

Chen Guihong is completely right, all the IGBTs needed by DJ4 electric locomotives can be purchased from Tang Fei, instead of wasting time and effort to import them abroad.

Noticing Xie Zhenhua's face, Chang Jinlin said: "Okay, old Xie, why are you so happy, you know, I am worried about the IGBTs that those two cars need." ”

Xie Zhenhua restrained his smile and said with a straight face: "Mr. Chang, there is one thing I am about to report to you, about our IGBT." ”

"Oh. Chang Jinlin looked at Xie Zhenhua seriously.

Xie Zhenhua said: "Yesterday afternoon, according to your instructions, I called Xiao Chen from the procurement center to inquire about the import of IGBT, who knows, Xiao Chen told me an exciting news......"

Xie Zhenhua told the matter again, and even said that Jiuzhou Industry Co., Ltd. prepared for IGBT manufacturing, and also said that Jiuzhou Industry will produce and manufacture the fifth-generation IGBT.

So, Chang Jinlin was shocked!

Jiuzhou Industrial Co., Ltd. is shocked enough to produce IGBT, and they will produce and manufacture the fifth generation of IGBT.

At present, the mainstream in the international market is the third generation of IGBT, I heard that the fourth generation of IGBT has just been born in a famous electrical group in the United States, and has not yet been fully introduced to the market.

For the IGBT that these two cars need, Chang Jinlin barely slept last night, thinking about which leaders to find and which people to go to after going to Beijing.

Now it seems that there is no need at all, and the booked ticket can also be refunded, because the thorny problem has been perfectly solved by Jiuzhou Industrial Company.

After a long time, Chang Jinlin said with emotion: "It's unbelievable, a few months ago, Xiao Tang said that he was going to do IGBT, and we still thought that Xiao Tang was a little whimsical, where did I think that this thing was really done by him." ”

What Tang Fei wants to do, which one doesn't make people feel whimsical.

At the beginning, everyone thought it was difficult, the water in the terminal was too deep, and as a result, Tang Fei not only made it, but also made the terminal into a high-quality product, and killed several competitors who made the terminal, such as Jinjiu Company, which is now completely bankrupt, and Liu Jinjiu is also in prison.

Tang Fei wanted to buy the original labor service company, and many people in the Red Star Factory felt that this was impossible, and Tang Fei would not have so much money at all. As a result, only a year later, Tang Fei bought the original labor service company as a whole.

Later, Tang Fei wanted to make traction motors, control cabinets, etc., which one did not make people think that it was almost impossible to succeed, and as a result, Tang Fei actually did it all.

A few months ago, Tang Fei said that he wanted to do IGBT, Chang Jinlin shook his head, thinking from the bottom of his heart that this was completely impossible.

Chang Jinlin was very touched and said movingly: "Old Xie, practice has proved that we have underestimated Tang Fei again and again. ”

Xie Zhenhua fully agreed, "Yes, as a result, Tang Fei surprised us again and again, and now even IGBT has been successful." ”

It has been successfully developed, all the production equipment is in place, even if the first high-power IGBT has not really been made, but Xie Zhenhua sees, this is a success.

The two sighed, and their hearts gradually relaxed, IGBT didn't have to worry about it, and it solved a big problem.

Chang Jinlin even said, wait a few days, he will go to Jiuzhou Industrial Company to take a look, and by the way, he also thanks Tang Fei for solving such a big problem for the Red Star Factory.

………

After some preliminary preparations, the time was ripe for the production and manufacture of IGBTs, and Tang Fei personally chose a good day to start the production and manufacturing of his first high-power IGBT.

The core of IGBT is chips and large-scale integrated circuits, and such core things are, of course, manufactured by Jiuzhou Industrial Co., Ltd. itself.

The first step in chip manufacturing is the use of lithography machines and wafer slicing.

Lithography machine Jiuzhou Industrial Co., Ltd. has one, which is also the world's most advanced large-scale high-precision lithography machine, which is used to produce and manufacture IGBT chips.

The first wafers have also been procured.

Wafer refers to the silicon chip used in the production of silicon semiconductor integrated circuits, which is called wafer because of its round shape. Wafers are the carriers used in the production of integrated circuits, and generally wafers refer to monocrystalline silicon wafers.

Wafers are the most commonly used semiconductor materials, and are divided into 4 inches, 5 inches, 6 inches, 8 inches and other specifications according to their diameters, and recently developed 12 inches and even larger specifications.

Jiuzhou Industrial Co., Ltd. purchased 8-inch wafers, imported. There is no way, the quality of domestic wafers at this time cannot be compared with imports, and it should take more than ten years of development to make domestic wafer factories with international first-class level.

The lithography machine is a separate constant temperature and dust-free large plant, which is the treasure of Jiuzhou Industrial Co., Ltd., and it is naturally focused on taking care of.

The production of chips was about to be carried out, and Tang flew to the production site. In addition, there are quite a few technical experts and technicians.

For example, Zhao Ke, such as Sun Xu and Tang Zhonghua, two experts, several technicians, the workers here are also carefully selected, the requirements are very high, ordinary workers can not enter this plant, let alone operate the lithography machine in person.

Under the guidance of technicians, several workers who are "fully armed" are carrying out the careful cleaning of wafer slices, which is the first step.

Then it has to go through multiple processes such as priming, spin coating photoresist, soft baking, alignment exposure, post-baking, development, hard baking, etching.

Wafer slicing is like a thin, very smooth mirror. Lithography is to photolithography the designed chip circuit structure onto wafer slices.

Lithography wafer slices, each piece can produce thousands, or even tens of thousands of chips, just like printing, lithographed wafer slices are printing templates, lithography is equivalent to typesetting.

The workers are meticulous and very careful to operate in strict accordance with the process requirements, cleaning the wafers, coating photoresist on the wafers, aligning the exposure, drying, developing and so on......

When the first photolithography of the wafer was made, Tang Fei was slightly excited in his heart, and thought in his heart that this should be the first piece in China.

Sun Xu and Tang Zhonghua personally carefully inspected the lithography wafer slice, and the two of them found a few small defects with a very critical eye.

Therefore, for these defects, the process parameters are perfected, improved, etc., and then the second wafer slice is lithography.

After several pieces in a row, no defects were found, the process was stabilized, and the workers who operated the lithography machine were much more skilled.

"Boss, come and take a look, this wafer is perfect, there are almost no flaws. Tang Zhonghua said to Tang Fei next to him.

Hearing this, Tang Fei also looked at it seriously. There is a special inspection equipment for the inspection of the wafer after lithography, which is also included in the system bonus package.

Tang Fei looked at it, was completely satisfied, and said loudly: "This is our first lithography wafer in the true sense." ”

The first lithographic wafer is made, and the next step is to use it as a template for printing, and print the circuit structure of the chip on the semiconductor material.

On the eve of New Year's Day, the first batch of IGBT chips and IGBT integrated circuits of Jiuzhou Industrial Co., Ltd. were manufactured.

These things were sent to the IGBT manufacturing plant, where workers began the production of the first high-power IGBTs.

In the huge workshop, workers wearing white coats and blue hoods were busy, and under the guidance of technicians, the production of the first batch of high-power IGBTs began.

Vacuum reflow soldering, ultrasonic cleaning, defect detection (X-ray), automatic wire bonding, laser marking, housing molding, housing potting and curing, terminal forming, functional testing......

One process after another, the first batch of 6500V IGBTs is gradually being manufactured.

In the office.

Tang Fei has just returned from the IGBT production site, even if it is not easy to go to the production site, because he has to be "fully armed", but Tang Fei still insists on going once a day these days to take a look at the production and manufacturing of his batch of IGBTs.

After coming back, I made a good cup of tea by myself, and I was a little excited to think that the first batch of high-power IGBTs was finally about to be produced.

After a few sips of tea, Tang Fei stood in front of the window of his office in a good mood, looking into the distance, and could see the large factory building that produced IGBT.

"Knock, knock, knock!"

Hearing a knock on the door, Tang Fei thought it was Zhao Ke coming, but a little surprised that it was Liu Jun who came in.

Liu Jun came in to report two things, the first thing is that the USB flash drive has successfully applied for a U.S. patent. The second thing is that the series of IGBTs designed and developed by Jiuzhou Industrial Co., Ltd. have successfully applied for domestic patents and are applying for international patents.

Hearing such a report, Tang Fei was in a better mood and praised Liu Jun a few words. Liu Jun happily walked out of Tang Fei's office.

In Tang Fei's view, Liu Jun is really good, his work ability is very good, and he has completed one patent application after another for himself, and the intellectual property rights and patented technologies of many things are currently firmly in the hands of Jiuzhou Industrial Co., Ltd. itself.

As a reborn person, Tang Fei is very aware of the importance of intellectual property rights and patented technology, and the first thing he does when every new product is developed is to tell Liu Jun to apply for a patent as soon as possible.

As I was about to leave work in the morning, there was another knock on the office door.

It was Zhao Ke who came in this time, he didn't come in empty-handed, he held something in his hand, put it on Tang Fei's desk, and said happily: "Boss, take a look, how about it!"

This is exactly what Tang Fei has been waiting for.

…………

Today's two watches, the first one is sent!