Military Industry of Great Powers: Build the Strongest Flanker

The manufacturing process of gallium nitride light-emitting semiconductors on the horizontal plane is relatively low, even if it is 300 microns, there is no problem.

But on the vertical layer, the requirements are even higher.

The thickness of these layers is measured in nanometers.

This requires a strict operating environment and detection tools.

For example, atomic distillation requires that the temperature of the vaporized metal has an error of no more than ten degrees. This is a high temperature condition of several thousand degrees, and it must be in a vacuum environment or an environment filled with inert gases.

As for measurement, it is even more critical.

An accurate electronic measuring instrument is required. A circular accelerator is used. The electron Ford energy is accurate to four decimal places. It is measured through the reflective material embedded in the base layer and through the high-sensitivity photoelectric semiconductor to detect the reduction of the reflected electron energy. thickness.

High-precision electron accelerators, high-sensitivity optoelectronic semiconductors, and corresponding computing processing chips...

"These are all pitfalls that can't be filled. The country doesn't have the ability to create them."

Zhao Guoqing’s advantage is that he can design the optimal thickness of the epitaxial layer, the optimal doping purity, the thickness and materials of the P and N electrodes, and the field effect structure of the PN electrode through theoretical calculations.

These things require the West to explore for another twenty years.

Regardless of thickness, purity, or the purity and structure of the material, the slightest difference can make the difference huge. This is why many Western scientists have given up research on gallium nitride light-emitting semiconductors.

Because of the experiments they conducted, the performance of gallium nitride light-emitting semiconductors was not that outstanding at all.

Even when Japan's Osamu Nakamura, Isamu Akaki, and Hiroshi Tano invented blue-light LED, in fact, the performance of blue-light LED at that time could only be said to be excellent, not amazing.

Blue LEDs with ten times the luminous efficiency still require thirty years of research around the world.

Zhao Guoqing let out a long sigh. In his opinion, the five-year honeymoon period between China and the West, the introduction of these equipment is the most important thing.

Look at the furry bear next door.

Wouldn't they be willing to use lighter semiconductor chips? Keberg even stole the blueprints for America's most advanced chips.

But what's the use?

Due to poor manufacturing processes, the performance of the chips they produce simply cannot meet the demanding requirements of the military industry.

This also forces them to delve deeper into tube technology and can only use semiconductor chips in auxiliary equipment.

You know, there is also a huge technological gap in the same 14-nanometer process.

Don’t think that once the manufacturing process catches up, it will reach an advanced level.

It's still far away.

Of course, this is also a shame, relying on poor materials, rough processing, and backward electronic technology to develop a system engineering that will be coveted by China and the United States even 40 years later.

At this time, Zhao Guoqing and Director Gao were sitting in Deputy Director Gong's office.

The tea has been refilled several times.

Deputy Factory Director Gong wanted to talk to Director Gao, but seeing that Director Gao had no interest in talking at all, he had no choice but to do it.

Zhao Guoqing put on a bad face, and Deputy Director Gong was unwilling to pay attention to him.

After adding the last round of water, Deputy Director Gong escaped by going to fetch water.

That's okay, Gao Changming also felt awkward with Deputy Director Gong around, so he left Qingjing.

Gao Changming looked at Zhao Guoqing with a wry smile on his face.

I don't know when it started, but their mood was also affected by Zhao Guoqing.

"How about it? It's National Day. Do you want to ask those Japanese people again? Even if you beg them, I, Lao Gao, will admit it!"

"No, Director Gao, let's listen to what Deputy Chief Engineer Tong has to say first!"

Zhao Guoqing wondered whether he should find Director Liu Qing again and put the matter of building a joint laboratory with the Japanese on the agenda.

Or is it possible to buy a batch of ion injectors, atomic stills, and some high-precision detection instruments?

Is there any other way?

The United States, Britain, France and Germany are also possible. At this time, Batumi's restrictions on China are already very small, so you should be able to buy them.

But Zhao Guoqing couldn't speak.

"As the vice-captain, Mr. Jin must have a lot of say!"

It seems that we need to report to Mr. Jin early.

I don’t know how long I had been thinking about it, but there was a knock on the door outside.

Deputy Factory Director Gong brought Deputy Chief Engineer Tong into the office.

Vice President Tong didn't waste any time and asked directly: "Do you have any drawings?"

Zhao Guoqing nodded and was about to open his briefcase and take out the drawings.

Director Gao patted Zhao Guoqing's arm.

"National Day!"

Zhao Guoqing shook his head and said, "Just discussing the manufacturing process!"

"Okay, you figure it out!"

Tong Yibo took the drawing and immediately frowned.

"It's not easy! You have two atomic distillations, three etchings, and two chemical vapor depositions. Fortunately, the process requirements are not high, otherwise calibration alone would not be able to solve it."

Zhao Guoqing said: "It involves multiple etching and photolithography cleaning, which is a bit troublesome!"

"I've never seen this kind of PN structure. What does it do?"

"For military purposes, confidentiality, Deputy Chief Engineer Tong, do you think this can be done? Where can it be done?"

Tong Yibo shook his head and said: "You need to solve this gallium nitride epitaxial layer yourself. In fact, the most difficult thing for you is thickness control. The error is only 3% plus or minus... This..."

Zhao Guoqing looked at Director Gao and nodded slightly. The expert got to the point when he spoke.

"Is there any way?"

Tong Yibo shook his head and said: "If you have a project, there will be no problem. If you don't have a project and act recklessly, it will be a big problem!"

"What's the meaning?"

"It is necessary to gather no less than three units. I don't know if there are high-precision measuring instruments in China, but it can be assisted by calculations. Under specific temperature conditions, the thickness deposited per second can be estimated, but it also brings about a problem, that is, it is not accurate. !

If only one layer can be guaranteed, if you add seven or eight layers, the cumulative error will increase exponentially, and the number of attempts required will be terrifying. "

Zhao Guoqing frowned slightly, and the meaning was very clear. The more times he tried, the more money he spent, just like chip tape-out. Forty years later, the media reported that a tape-out costs tens of millions of dollars.

Success, no problem, trial production.

If you don't succeed, you need to keep going like this.

Many companies that do not have strong technical or financial resources fail like this.

So if there is a project approved, then the state spends money, but if there is no project approved, then the 14th Institute spends the money. How can the 14th Institute’s financial resources support it?

Semiconductors are really not something anyone can play with. Zhao Guoqing still saves the design demonstration link that costs the most money, as well as the most basic physical research, which is also the bulk of the money.

Tong Yibo pointed to the drawings and said to Zhao Guoqing: "It seems that you haven't finished the finished product yet. Are you sure there is no problem with your structure?"

Even if you make it as required, what should you do if there is something wrong with your drawing?

This risk made Tong Yibo keep shaking his head.