Movie black technology

The so-called chemical preparation can be understood in the most popular way as they are "bubble" 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 to the carbon nanotubes. rope".

The two ropes are in a complementary relationship and can be connected to each other. Therefore, 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 position as desired.

And by adjusting these "ropes", the carbon nanotubes can also be arranged into various shapes, as if a person can be tied into different poses with a rope to play...

Or like a bundle of wood, as long as the rope is enough, the wood can be bundled as much as you want.

The prerequisite for the batch preparation of carbon-based chips is to achieve ultra-high semiconductor purity, in-line, high density, large-area uniform carbon nanotube array film.

Only when the above requirements are met can it be possible to mass-produce carbon-based chips.

And if you want to reproduce the Oasis 1 in the system, you need to continue to develop enough time on the basis of this realization to be possible.

Chen Shen opened up 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, it can be said that it is completely complete, and all the valid data generated by the experiment was sent to him without reservation.

This gave Chen Shen a great convenience.

Because of the special circumstances this time, carbon-based chips have already been researched by universities in China, and they have achieved impressive results, fully demonstrating their strength.

Therefore, Chen Shen does not plan to set up an additional chip lab for himself in the base. After all, Yuanmingyuan Vocational and Technical College already has it, and adding another one on his side is completely wasteful.

Moreover, waiting for the process of building the laboratory and team will waste his time, and at the same time disperse the main research force, causing a waste of research resources.

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

Related experiments can be remotely commanded by him.

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

Through the information and data at 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 at home and across the ocean, and other countries and regions are still accumulating entrance tickets.

In the two players at home and abroad, the routes taken by the two players are different.

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

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

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

But even so, there is still a long way to go before such carbon-based chips can truly achieve industrial production and put them into market use.

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

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

Recently, breakthrough progress has been made. For the first time, a 5nm gate carbon nanotube CMOS device has been manufactured. Its operating speed is twice as fast as the latest commercial silicon transistor from a toothpaste factory, but its energy consumption is only 14%. This shows 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 technology routes, domestic carbon-based chips are also very different in production technology.

The current domestic carbon-based chip preparation process is still very rudimentary and primitive, and there is still a lot of room for improvement. It is probably like this:

The first step is to purify the carbon nanotubes to a purity of 99.9999%, commonly known as six nines, to obtain semiconductor carbon nanotubes. Only carbon nanotubes of this purity or higher can be used in integrated circuits.

The second step is to control the various structures required by the single-stranded DNA to build the carbon nanotube into an integrated circuit, and automatically form the corresponding assembly.

At this point, all these automatically assembled assemblies are still immersed in the solution.

The third step is to make a real circuit, which requires the assembly of DNA to be regularly built on the substrate.

This requires sticking a layer of film on the substrate, and then using a photolithography machine and other equipment to carve out the nano-scale pattern corresponding to the assembly on the substrate, and then drop the solution containing the assembly on the substrate.

In this way, the assembly in the solution will be spread out on the substrate, but only the assembly that matches the nano pattern can fall into the substrate, and the other assemblies that are not arranged neatly remain on the surface of the substrate. On that layer of film.

Finally, remove that layer of film, and the assembly can be arranged regularly as required.

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 think. You can get rid of all constraints by changing a material.

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

Even if you don’t use a photo-engraving machine, there will be a dark-engraving machine, an engraving machine...

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

After all, the processing capabilities of nano-patterns are not unique to lithography machines.

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

After reading these data, continue to scroll down, and soon he found a different paper.

"DNA-oriented nano-preparation 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 index of the effect transistor based on the carbon nanotube array by more than 10 times.

In human terms, it is at the interface of high-performance electronics and self-assembly of biomolecules. This method can use scalable DNA biological templates to make nanoscale electronic patterns.

In other words, no lithography machine is needed!