Hand rubbing nuclear fusion live in the wilderness

Chapter 412 Carbon-Based Photoresist with Excellent Performance
The manufacturing process of the core component of the 'carbon-based ultraviolet photoinitiator', the photoinitiator, is quite complicated. Even if more than half of the steps can be controlled by an intelligent program, the probability of failure in its preparation is not low.

Even for the Korean won, it took two days of tossing and three failures in different periods before the two synthetic materials of the photoinitiator were prepared and a complete sensitizer was synthesized.

The prepared sensitizer is colorless and transparent as a whole, and is as viscous as honey.

These photoinitiators are packed in brown bottles made of polyester material and stored in a dark refrigerator with a temperature control of [-] degrees.

The reason why glass containers are not used is that the photoinitiator after molding will react with silicon.

The storage environment is protected from light, and the principle is the same.

As can be known from the name 'photoinitiator', this material is quite sensitive to light, and exposure to light will cause changes in the properties of the material.

Therefore, after synthesis, until the time of use, the whole must be kept away from light.

Including the 'carbon-based ultraviolet photoinitiator' synthesized by using the 'photoinitiator', that is, the carbon-based chip photoresist, must be stored in a dark environment.

After being taken out, the carbon-based photoresist will gradually fail due to factors such as exposure to light and contact with external substrates. The time is about an hour.

Of course, if it is only preserved, this carbon-based photoresist can still be preserved for a long period of time by means of avoiding light and vacuum.

Brown polyester bottles like Korean Won can be stored for about two years without light and non-vacuum storage.

If the preservation method is more rigorous, the preservation time can be increased to about three years.

That's enough.

It took a week to synthesize everything from the solvent group to the sensitizer to the photosensitive resin, and assembled it into a photoresist that can be used on graphene single crystal wafers.

The molded photoresist is translucent as a whole, with a slight milky white, and the light transmittance is quite high.

After Won saved most of the photoresist, he took a small part and did an experiment.

Take out a small piece of graphene single crystal wafer that has been prepared and cut before, half of which is coated with photoresist, and the other half remains as it is.

The processed graphene single crystal wafer is irradiated by an ultraviolet light source for 30 seconds.

After the 30-second irradiation time, Won took it out, washed off the carbon-based photoresist covering it with a special solution, and then immersed it in a developing solution.

Although the graphene wafer soaked in the solution does not see any changes with the naked eye, when Won holds the wafer with tweezers and shakes it gently in the developing solution, he can see the color change of the developing solution.

That's caused by the graphene material being eroded away by the developing solution and washed away.

Take the graphene wafer out of the developing solution, clear off the remaining liquid on it, and through the observation equipment, you can clearly see that the surface of the graphene wafer has undergone considerable changes.

The area not covered by the carbon-based photoresist has been almost eroded by the developing solution, while the other half covered by the photoresist has not changed much.

This is the credit of the negative photoresist.

After it is covered on the surface of the graphene single crystal wafer, it can be rapidly metamorphosed in a short period of time by ultraviolet light, changing the graphene structure in the covered area, enhancing its resistance to the developing solution, and making it less susceptible to erosion.

The place that is not covered with photoresist will be eroded away, forming a shape opposite to that of the light-shielding object.

That is to form the opposite appearance of the mask.

This is the most important principle of chip engraving by lithography machine, and it is also the main reason why photoresist is extremely important in the chip manufacturing process, even comparable to lithography machine.

After inspecting the graphene single crystal wafer that had been eroded by the developing solution, Han Yuan also showed a bright smile after getting various information and data.

The effect of the prepared carbon-based photoresist is quite good, and the covered area is almost completely preserved after being irradiated by the ultraviolet light source.

And this is only the effect of ultraviolet light sources with ordinary energy levels. If it is the extreme ultraviolet light used in carbon-based chip lithography machines, the effect will be even better.

After all, the wavelength and energy level of ordinary ultraviolet light cannot be compared with extreme ultraviolet light.

After processing the photoresist used in carbon-based chips, about [-] days have passed in the third year.

This is the approximate time. I didn’t count how many days have passed. After all, I’m always alone in the simulation space, so it’s useless to count the time.

On this day, Xiao Qi's voice came from the communicator carried on Han Yuan's wrist.

"Master, Xiaoba and Xiaojiu found something unusual, which has a certain probability to be related to those giant insects."

Xiaoqi's voice came out of the communicator, which aroused the curiosity of Han Yuan and the curiosity of the audience in the live broadcast room.

"what's the situation?"

Han Yuan asked in surprise, no wonder Xiaoba and Xiaojiu have not been seen for a while, so they ran out.

But Xiao Qi's words surprised him a little.

Since the last time he dived into the water to find the mothers of those giant insects and disposed of them, the matter of giant insects has basically come to an end.

With the cooperation of communication and reconnaissance satellites that can cover the whole world, coupled with Xiaoqi's own powerful computing power and intelligence, those giant insects, including the female insects, have almost been cleaned up. Why are they popping up again now?
Han Yuan feels that this thing is a bit lingering.

"It's not a giant living insect, it's more like a stone sculpture."

Xiaoqi's voice came from the communicator, arousing Han Yuan's curiosity again.

"sculpture?"

Han Yuan raised his eyebrows, and said, "Where is it? Did the satellite take pictures, if so, send the video and pictures over for me to see."

"Okay, master."

Xiao Qi responded, and then fell silent.

Han Yuan didn't care, turned around and came to the display screen in the chemical laboratory to wait.

After about a minute, Xiao Qi's voice sounded again.

"Relevant pictures and video information have been delivered to you, master, the specific storage location is as follows: /No.90 storage disk/NO.[-] folder/"

"Well, okay, let me take a look first."

Han Yuan responded, and manipulated the special input keyboard to open the folder where Xiao Qi sent the information.

The pictures and videos captured by the reconnaissance satellite are stored in it, and when one picture is opened, what appears on the screen is a huge insect
Seeing the picture, Han Yuan's eyes froze, almost thinking that those giant insects appeared again.

But then, the giant insect in his sharp gap picture was a little different from anything he had seen before.

As the picture opened, at the same time, there was an uproar in the live broadcast room.

[What the hell, these bugs came out again. 】

[The ghost is still there. 】

【Hey, why do I feel like this giant worm is dead? 】

[Is it a stone carving?Xiaoqi, the smart housekeeper, said before that it was not a bug, but a stone sculpture related to bugs. 】

[It should be a stone carving. Look carefully, Xiaoba and Xiaojiu are still on it. If they were alive, they would have been eaten long ago. 】

[Worm stone carving, who carved this?Don't tell me it's those bugs?I can't even believe that those bugs still have sculpture art. 】

【The anchor, do you want to go over and see what's going on?You have the flying machine anyway. 】

There were constant discussions in the live broadcast room, and some bullet screens caught Han Yuan's attention. His heart moved and he asked Xiaoqi.

"Xiao Qi, where is the exact location of this stone sculpture? How far is it from me?"

Soon, Xiao Qi's voice came through the communicator.

"The location of the stone carving is 87.47973 east longitude and 42.898552 north latitude. According to the geographical location information marked by you, the owner, it is in a desert called the Taklamakan Desert."

Hearing Xiao Qi's answer, Han Yuan froze for a moment, then looked at the picture again.

He just ignored the surrounding environment of the stone sculpture, and focused all his attention on the stone sculpture. Looking at it now, there is indeed no vegetation around the stone sculpture, and there are sharp gravels of various shapes everywhere.

Although it is not a desert scene, it is in line with the appearance of the Gobi Desert.

"Would you like to go take a look?"

Han Yuan stared at the stone sculpture on the display and thought.

The appearance of this stone sculpture also made him very curious. He had never thought that such a thing would appear before.

If the distance is short, it doesn't matter if you drive the Leluo Triangle Aircraft to go there, it will be fast anyway.

But now the place where this stone sculpture appears is far away in the Taklamakan Desert in Huaguo, on the other side of this simulated planet. This distance is really a bit far.

Even if there is a Leluo triangle aircraft, it will take about ten hours to fly there, and the distance plus the time for exploration and investigation will take at least two or three days.

This made him hesitate a bit.

Staring at the picture, frowning, just as Han Yuan was about to veto the idea of ​​falling over, a certain scene in the coherent video played on the display caught his attention.

Pausing and calling back, Han Yuan stared at the stone sculpture with a hint of metallic light on the screen and quickly made a decision.

past!

Having made a decision, Han Yuan quickly got up, and the Leluo triangular aircraft parked by the river as a power supply device quickly took off.

After more than seven hours of flying, under the guidance of Xiao Qi, the aircraft landed in a vast and endless desert.

Han Yuan got off the aircraft with all kinds of tools and equipment on his back, and quickly came to the giant stone sculpture that Xiaoba Xiaojiu found.

This giant insect-like stone sculpture is quite large, lying sideways in the desert, it is taller than a Korean won, and a small half of it is buried in the soil.

Han Yuan stepped forward, observed for a while, and took out a small pick with a pick beak from behind, and tapped the sharp beak on the stone carving lightly.

"Clang~"

A crisp metal knocking sound came from the collision point, which stunned the audience in the live broadcast room.

[Metal sound? 】

[It's not stone, but metal? 】

【what's the situation? 】

[Metal stone carving?I'm even more curious as to what's going on here. 】

[Judging from the sound, the inside of this stone sculpture is hollow. 】

【? ? ? ? ? 】

[Who would carve a metal insect statue in the desert? 】

The audience in the live broadcast room were very curious about the crisp metallic sound made by the stone carving, and even the officials from various countries squatting in the live broadcast room were the same, speculating on the origin of this metal insect statue.

After hearing the hollow metal sound, Han Yuan suddenly understood, and initially confirmed the speculation in his heart.

In order to confirm the speculation, Won held a metal pickaxe and knocked along the giant statue several times, confirming that the entire statue is hollow.

Putting down the pickaxe in his hand, Han Yuan walked around to the head of the statue, grabbed the raised part of the sculpture with both hands, and pulled the metal sculpture out of the soil with force.

This move shocked the audience in the live broadcast room.

A giant sculpture with a diameter of more than two meters and a length of more than five meters was pulled out like this?

Even if it is hollow, its weight cannot be lifted by one person, right?

Not to mention the audience in the live broadcast room, even Han Yuan himself was taken aback.

Before doing it, he was ready to dig to get the statue out. After all, this thing is very big and probably heavy.

But what Han Yuan didn't expect was that after getting started, he realized that this thing was unimaginably light. He tried to pull it out with all his strength, but he was staggered to stabilize it.

Putting the metal statue on the ground, Han Yuan circled around and found a big hole at the end of the statue.

Curiously, I looked inside. The whole statue was only supported by a thin layer of material. It was hollow and dark inside, as if it had been inhabited by something.

Han Yuan put on protective gloves and touched along the edge of the hole. A layer of fine sand stuck to the gloves with a foul smell.

This smell is not very similar to those giant insects discovered before, it is exactly the same.

It can be seen that giant insects lived in this sculpture.

Combined with the fact that the size of the statue is much larger than that of ordinary giant insects, the answer is quite simple, the female worms of giant insects lived in it before.

Perhaps, this statue is the 'spaceship' of a giant insect.

For a long time, Han Yuan had a doubt in his heart.

Xiao Jiu once said that those giant insects came from extraterrestrials, but how they came to the earth through the universe and the atmosphere, this may only be known by the former host who has long since passed away.

But now, he also found a clue.

That is the giant metal statue in front of you.

After burning the statue in front of him with the alcohol blowtorch he carried, he found that the metal shell with a thickness of less than two centimeters had excellent heat insulation ability.

The alcohol blowtorch was burned outside for about ten minutes, and the temperature inside the place heated by the blowtorch did not change at all.

Although it has not been fully tested, the super excellent thermal insulation performance alone is enough to amaze people.

The temperature of the alcohol blowtorch can reach about [-] degrees. Although it is not as high as the high temperature caused by the intense friction when passing through the atmosphere, Han Yuan is very surprised by this performance.

He was even more curious about what this 'metal' material could do.

(End of this chapter)