Rebirth: It’s Like Flowing Water

Chapter 419 Gallium Nitride

Where to start? There is a lot of knowledge here.

When Byron saw Qi Lei's thinking, he couldn't help sneering.

"Don't think about it, you don't understand at all, what research direction can you find with intuition?"

Qi Lei raised his head and finally understood why Warren always had the urge to strangle Byron. This guy's words were really unpleasant.

However, you still can't be honest with him.

As a result, this grandson is too capable, and he has to be used.

Second, he really doesn't have any bad intentions. He simply doesn't care about other people's feelings. In fact, he is a good person.

At this time, Byron said, "Do you need me to give you some professional advice? Of course, Mr. Nan can discuss it together."

Qi Lei was naturally speechless, "Speak!"

However, Byron's first sentence made Qi Lei a little crazy.

"Actually, you don't have many choices."

"????"

Byron looked serious, "These days, in addition to preparing for the laboratory work, I also have a detailed understanding of your microelectronics industry in China."

Before he could finish speaking, Qi Lei interrupted, "It's China now!"

"Okay!" Byron smiled bitterly.

It is indeed China, because he has decided to become a Chinese citizen and is going through the relevant procedures.

He continued, "Our microelectronics industry is developing very badly..."

Qi Lei, "..."

Byron, "Almost blank! If I had known this was the case, maybe I would have reconsidered my decision to come to China!"

Qi Lei, "..."

special! ! I can't stand it anymore!

Byron, "Qi, please don't get me wrong, I'm not sarcasm, but stating facts."

Qi Lei shrugged, "That's why we need you."

Byron nodded, "This is indeed more motivation for me to devote myself to this career! Qi, you can't understand, I'm very excited now."

"?????" Qi Lei said in his heart, what kind of routine are you doing? Has it changed a bit fast? Just finished talking about reconsidering the decision to come to China, are you excited again? ?

But it was Sam who couldn't listen anymore. "What he meant was that if he had known this earlier, he would have come to China without you asking me!"

"what?"

Sam didn't know whether to laugh or cry, "This madman, when he was in the UK, longed for an industrial white paper to let him play to the fullest."

All right……

Byron, "Sam, shut up, I'm serious."

Sam, "..."

Byron is indeed not funny, and he is not in the mood to go around with these dirty people, "Qi, this is actually an advantage!"

Qi Lei, "How do you say it?"

Byron, "Because China's microelectronics field and semiconductor industry started late, there is no industry at all, so it is more conducive to us to build a complete industry."

After listening to Qi Lei, he blurted out, "The advantage of being late!"

"Last mover advantage?"

Both Byron and Sam raised their eyebrows, the word used very accurately.

Byron, "I can't wait to complete the construction of this industry chain."

"Oh shit, we're missing Warren! That guy is the best at that, he shouldn't be allowed to sleep in ARM."

Sam said, "It's the same with Qi Lei, he's more cunning than Warren."

Byron, "No!! He's cunning, but he doesn't understand!"

"Cough cough!!" Qi Lei couldn't take it anymore, "Let's get down to business!"

Looking at Byron, "So, you want to build an industry chain?"

Byron, "Of course, but only if you have money, a lot of money!"

Qi Lei, "This is not something you are worried about."

As long as Byron can do it, I will pay for it.

It's just that Qi Lei doesn't understand. Since he has the advantage of being a late mover, you also think it's a good thing, so why are there not many choices?

And Byron's explanation is, "There are really not many choices, just take the microelectronic materials and devices I just mentioned!"

Byron listed them to Qi Lei one by one.

"For example, monocrystalline silicon wafers."

"It is not difficult for me to prepare high-purity single crystal silicon. Even for large-diameter wafers, I have the confidence to complete the process design for industrial manufacturing in the laboratory."

Afraid that Qi Lei would not understand, Sam explained, "Preparation of high-purity monocrystalline silicon is a difficult point in the semiconductor industry, but that's what it is, the real difficulty is the large diameter."

"Because the chips are etched on the wafer, and the small squares are arranged in parallel, one wafer can etch many chips at the same time."

"However, the wafer is round and the chip is square, which inevitably causes waste of raw material at the edge."

"This means that the larger the diameter of the wafer, the lower the waste rate and the lower the cost of chip manufacturing!"

"So, wafer suppliers all over the world are trying to make the wafers as thick as possible."

After Sam finished explaining, Qi Lei nodded to indicate that he understood.

In fact, in later generations, he has also seen some reports about wafers and chips, and he knows that these things are particularly important in chip manufacturing.

"Then we can consider starting this technology first."

But it was Byron who poured cold water directly, "It's useless!"

"Why is it useless?"

Byron, "The process I completed in the lab, can you put it into production right away?"

Qi Lei, "..."

Byron, "Industrial mass production, you... We don't have a factory like this, and we don't have the supporting technology."

"Even if I complete the research, within five to ten years, I can only lie in the laboratory and wait for support."

"..."

"Besides, wafer manufacturing has been monopolized by several big companies around the world. Are you confident to break this monopoly?"

"Commercial application is something you should consider, do I need to remind you?"

"If you can't make money, what can you find out?"

Qi Lei, "..."

Bie's face flushed, he pondered for a long time, and finally gave up.

Or rather, let it go.

No way, people are poor and short-minded.

It is indeed unrealistic when this industry chain is almost impoverished.

The more important reason is that Qi Lei really doesn't have that much money.

If he had a 180 billion meter knife in his hand, would I still be talking nonsense with you? It's over, I'll make up for what you're missing.

It's a pity, it's still too poor!

Next, Byron listed some research lines of defense.

For example, logic circuits. That is the world of ARM and Intel, and there is no advantage to get in.

Photoresist, oxidizing materials, high-purity chemical reagents, etc., are still not something that Japanese people should start at the initial stage.

In the end, among dozens of options involving microelectronics, Byron only gave Qi Lei four options.

Or rather, the four options given by Sam.

"Polysilicon, molding materials, ultra-high-purity gas materials, and wide-bandgap semiconductor materials."

The explanation given by Sam is, "First of all, in these four areas, Byron has an academic advantage."

"Secondly..."

Sam explained to Qi Lei and Nan Lao one by one, "Polysilicon, although the international supply competition is also very fierce."

"But after all, it is the upstream raw material of monocrystalline silicon, and the supporting industry level required is relatively low. It is easier to achieve mass production. Maybe we can still find a way out."

"As for plastic packaging materials and ultra-high-purity gas materials, firstly, the iterations are frequent, and we are easy to surpass; secondly, the level of supporting industries required is low, and most of the proportions come from the chemical industry. In this regard, China has a solid foundation. Yes. As long as a cooperative chemical factory is found, and supporting upgrades and transformations are carried out, mass production can be achieved.”

"and……"

At this time, Qi Lei had already guessed, "Moreover, in the chemical industry, China has a manufacturing cost advantage."

Sam: "Yes! The Japanese and American manufacturers currently supplying the world do not have the labor cost advantage of China."

"As long as we can do it, the cost must be lower than theirs and more competitive."

Qi Lei nodded and continued, "Then... what is Kuan?"

Byron looked disgusted, "Wide-bandgap semiconductor materials!"

Sam said, "The consideration of this option is completely different from the first three."

Qi Lei, "Why is it different?"

Sam, "Because this is cutting edge technology!"

Qi Lei, "!!"

In this regard, Nan Lao also knew something, and explained to Qi Lei, "You just need to know that the energy of electrons in solids has discontinuous magnitudes."

"To put it bluntly, there is a gap between valence electrons and free electrons, and this gap is called the forbidden band"

"Valence electrons have to pay extra energy to become free electrons."

"The narrower the band gap, the less energy you pay."

"For example, the forbidden band of silicon is 1.12 electron volts, and if it is greater than 2.3 electron volts, it is called wide band gap."

At this time, Nan Lao smiled and said, "Don't think that the narrower the forbidden band, the better. With the trend of chips and manufacturing tools getting closer to the physical limit, a narrow forbidden band is not a good thing. Sooner or later, it will restrict the development of chips."

"So, wide bandgap semiconductor materials have become a hot research direction in the field of microelectronics in the world today."

Looking up at Byron, "Mr. Byron, what kind of wide band gap material is good at?"

"Silicon carbide? Black silicon carbide? Or green silicon carbide?"

Silicon carbide is a popular wide-bandgap material at the moment. Because of its different purity, it is divided into two types: black and green.

Hairy silicon carbide is 95% pure, while green silicon carbide can reach more than 97% purity.

In this regard, there are also research teams in China, but they are far from the international level.

It is said that some foreign companies have been able to achieve mass production of green silicon carbide and are in the demonstration stage.

Nan Lao couldn't help being a little excited when he arrived here. You know, black silicon carbide is better. If Byron can achieve mass production of green silicon carbide, it will be a treasure!

With that alone, Qi Lei wouldn't be at a loss if he kidnapped this person back.

However, what Nan Lao didn't expect was that when Byron heard something black and green, he sneered, "I have also studied silicon carbide for a while, so it's nothing unusual."

Nan Lao, "????"

I only heard Byron said, "The wide band gap material I am involved in is gallium nitride."

"!!!"

Nan Lao Teng stood up, and Qi Lei was also surprised.

"Gallium Nitride? Does the name sound so familiar?"

I can't remember where I learned about it, but Qi Lei can be sure that this thing should be awesome.

...

Really awesome!

Even 20 years later, gallium nitride is still the frontier and hotspot of global semiconductor research, and is called the third-generation semiconductor material.

It has a wide band gap, high thermal conductivity and strong atomic bonds, extremely high chemical stability, a melting point of 1700 degrees, and is hardly corroded by any acid.

Moreover, there is a very strong high radiation capacity.

Because of these characteristics, it has a very broad prospect in the application of optoelectronics, high-temperature high-power rail devices and high-frequency microwave devices.

Let me put it this way, Qi Lei may not know that in 1989, three Japanese scholars won the 2014 Nobel Prize in Physics just by using gallium nitride to create a high-efficiency diode that emits blue light.

In the current 2002, the main application of gallium nitride is LED light-emitting devices.

As for later generations, the most well-known one is fast charging.

After Qi Lei listened to Nan Lao and Byron's rounds of popular science, he remembered a sentence, "Gallium nitride is also an important manufacturing material for violet laser diodes."

Purple light?

Asmar?

"Just study this thing!!"

"The remaining three, which one of your majors to go to first, I want this thing!!"

Byron was startled. To be honest, the most unreliable thing was this gallium nitride.

With the other three options, Byron is confident that it will be put into production in a very short time, opening up the situation.

But gallium nitride?

Maybe 20 years of research and a lot of money will be worthless.

What is cutting-edge technology? What are the characteristics of this thing, how to mass-produce it, and how to realize commercial value.

Its potential has not been fully tapped, and no one knows what the final result of this research will be.

This is like the study of graphene in later generations. The material properties are simply invincible. Twenty years later, the high-quality material properties of graphene are still being explored, and people are constantly surprised.

Once low-cost mass production is achieved, human application technology will be a revolution.

However, no one knows when this thing can be mass-produced at low cost.

Maybe ten years, maybe one hundred years.

It is said that gallium nitride is the same, it can be prepared in the laboratory, and mass production is not impossible, but without considering the cost.

As for mass production of low-cost devices, at least 2002 looks a long way off.

Even when other applications are researched, no one can give a specific timetable.

To be honest, this research direction is quite risky.

How could Qi Lei, a profiteer, be so determined to have this thing?

As a result, Qi Lei said, "Byron, I don't want mass-produced gallium nitride substrates, nor do I want LEDs."

"These can be released first, let the Japanese people play by themselves first, I only need one thing!"

Byron is a little confused, you don't understand anything, why are you so sure all of a sudden?

"What do you want?"

"Extreme violet laser!"

Byron: "..."

this thing? I'm not very good at it!

Byron is not God, he is just a chemist, he is good at researching materials, but gallium nitride is only a component of laser diodes.

That's the realm of physics.

However, this can't be said, saying that you can't do it yourself? Not even killing Byron.

So what can I do if I can't do it?

Just find a reason.

"Qi, you really don't understand anything. This topic requires a large team, and I can't do it alone."

Look, isn't this just a matter of prevarication?

As a result, "Who do you want? I'll find you!"

Byron, "..."

chap!

Forget it, it's not a problem in China.

How can this be done?

Had to bite the bullet ~ www.readwn.com ~ I think. "

On the other hand, Sam frowned and pondered, "Extreme purple laser?"

We are making chips, doing this stuff... Then there is only one place where there is an application!

Looking up to test, "Do you want to go the lithography route?"

Qi Lei, "Hey, guess what?"

...

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【Monthly pass coin slot】

【Recommended ticket coin slot】

This plot is a bit concentrated, isn't it meaningless?

It's over.

That's all for today. If there's nothing else to do tomorrow, I'll make up for it.