Movie black technology

The so-called chemical preparation can be understood in the most popular way as that they are "bubbled" in various special solutions.

The permutation and combination achieved by using single-stranded DNA as a tool can also be simply understood as releasing a No. 1 "rope" where the carbon nanotubes are to be placed, and then attaching a corresponding No. 2 "rope" to the carbon nanotubes. rope".

These two ropes are complementary and can be connected to each other, so the No. 2 rope will tie the carbon nanotubes to the No. 1 "rope", so that the carbon nanotubes can naturally fall to the corresponding positions as desired.

And by adjusting these "ropes", carbon nanotubes can also be arranged into various shapes, as if a person can be tied into different postures with a rope for PLAY...

Or like tying firewood, as long as there is enough rope, the firewood can be tied however you want.

But that's how the system works.

The premise of mass production of carbon-based chips in reality is to achieve ultra-high semiconductor purity, parallel arrangement, high density, large area and uniform carbon nanotube array film.

Only by meeting the above requirements can it be possible to mass-produce carbon-based chips.

And if you want to reproduce the Oasis No. 1 in the system, you need to continue to develop enough time on the basis of this realization to be possible.

Chen Shen opened the materials sent by Wang Qian. In addition to the most basic learning materials, there are also the latest research materials at home and abroad, as well as corresponding experimental data.

Among these experimental data, the most detailed in the country can be said to be complete, and all the effective data generated by the experiment were sent to him without reservation.

This gave Chen Shen great convenience.

Because of the special situation this time, there are already universities in China conducting research on carbon-based chips, and they have achieved impressive results, fully proving their strength.

So Chen Shen didn't plan to set up an additional chip laboratory for himself in the base. After all, the Yuanmingyuan Vocational and Technical College already had one, and adding another one to him would be a waste.

Moreover, waiting for the process of setting up the laboratory and the team will waste his time, and at the same time disperse the main research force, resulting in a waste of research resources.

Instead of doing this, it's better to just share a laboratory with Yuanmingyuan Vocational College.

Relevant experiments can be commanded remotely by him.

And in some details, the team of Yuanmingyuan Vocational College must be more professional than him, and can give him more help.

Through the information and data in hand, Chen Shen quickly understood the current development of carbon-based chips at home and abroad.

At present, the main players of carbon-based chips in the world are domestic and the other side of the ocean, and other countries and regions are still saving entry ticket money.

And among domestic and foreign players, the routes taken by the two sides are different.

Among them, the opposite side is more concerned about the compatibility of carbon-based chips and existing silicon-based chip processes. They use the current standard EDA chip design software to prepare carbon-based chips using materials and processes compatible with silicon-based chips.

An integrated circuit composed of 14,000 carbon-based transistors has been produced and operated successfully, but its performance has only reached the technical level of silicon-based chips 30 years ago.

The biggest highlight of this technology is that it is made on a commercial silicon-based line, which can realize industrial applications faster. The previous strong silicon-based chip manufacturing capabilities have laid a good foundation for them.

But even so, there is still a long way to go before this kind of carbon-based chip can truly achieve industrial production and be put into the market.

Compared with foreign teams, the domestic Yuanmingyuan Vocational College team is taking another innovative path.

Starting from carbon tube manufacturing, assembly process and component structure, they creatively developed a set of doping-free manufacturing methods for high-performance carbon tube COMS devices.

Recently, breakthroughs have been made. For the first time, a 5nm gate carbon nanotube CMOS device has been manufactured. Its working speed is twice that of the latest commercial silicon transistors in toothpaste factories, but its energy consumption is only 1/4 of that. This shows that It is found that carbon nanotube CMOS devices below 10nm have obvious performance advantages over silicon-based CMOS devices.

Moreover, the team of Yuanmingyuan Vocational College has a clear lead over foreign teams in terms of high-performance carbon-based transistors and high-quality carbon nanotube materials.

In addition, compared with foreign technical routes, the production process of domestic carbon-based chips is also very different.

The current production process of carbon-based chips or integrated circuits in China is still very rudimentary and primitive, and there is still a lot of room for improvement. It is roughly like this:

The first step is to purify carbon nanotubes to 99.9999%, commonly known as the purity of 6 nines, to obtain semiconducting carbon nanotubes. Only carbon nanotubes with this purity or above can be used in integrated circuits.

The second step is to arrange the carbon nanotubes brightly on the wafer.

The domestic method used in this step is the dimensionally limited self-assembly method. First, the carbon nanotubes purified in the previous step are dispersed in trichloroethane, and then butenediol is dropped on the dispersion, and the butenediol will be in the Trichloroethane forms an immiscible thin layer on the surface. Since the previous purification step coated a layer of polymer on the surface of the carbon nanotubes, the carbon nanotubes will be arranged in parallel on the interface of butylene glycol and trichloroethane.

At this time, the wafer vertically inserted in the solution is slowly pulled up vertically, and the surface tension of the liquid will pull these carbon nanotubes parallel to the wafer, and even up to 200 carbon nanotubes can be placed in a space of one micron. carbon nanotubes.

Next, add source-drain electrodes and gate electrodes to both sides of the carbon nanotubes to turn it into a transistor, all of which require the use of micro-processing techniques such as photolithography.

Yes, the current carbon-based chips still need to use technologies such as photolithography and electron beam etching to obtain nanoscale electronic patterns.

It's not as easy as some people imagined. You can get rid of all the shackles by changing a material.

Because this micro-level processing capability is necessary for chips.

Even if you don't use a lithography machine, there will be a dark engraving machine and a bright engraving machine...

Chen Shen has long been mentally prepared for this, but he still hopes to find a process that does not require a lithography machine.

After all, the processing capability of nano-patterns is not only possessed by lithography machines.

If he waits for the development of domestic lithography machines, it will be a waste of his carbon-based chip technology.

After reading the data, he continued to scroll down, and soon he found a different paper.

"DNA Oriented Nanofabrication of High-Performance Carbon Nanotube Field-Effect Transistors"

This is also a paper published by a professor of Yuanmingyuan Vocational College.

This paper uses the parallel carbon nanotube array prepared by the DNA template method as a model system, and develops a method of fixing first and then washing, which improves the key transmission performance indicators of the effect transistor based on the carbon nanotube array by more than 10 times.

In human terms, at the interface of high-performance electronics and biomolecular self-assembly, this method can use stretchable DNA biotemplates to make nanoscale electronic patterns.

In other words, no lithography machine is required!

This chapter is not easy to write. Although I have already prepared, I turned on the computer at 9:00 in the morning and stopped after writing more than 100 words. I kept checking the information until 2:00 and started again. There shouldn’t be any particularly serious mistakes in this chapter. If there are any, sci-fi science fiction, let’s treat it as a part of fantasy. I can’t conjure a carbon-based chip, otherwise, I would have gone to Beijing to gain popularity Drink spicy.

The next one should be at seven or eight o'clock, have lunch, code a few hundred words and then go back to get off work