I, Yan Jiefang, will live to 2025 in this courtyard house.

Manufacturing DRAM chips requires not only silicon wafers and photoresist, but also a whole set of high-purity materials.

The photolithography process requires expensive quartz chromium masks, TMAH developer, and various photoresist stripping solvents.

The entire production line consumes a large amount of electronic specialty gases. Silane and ammonia are used to deposit insulating films, while fluorine and chlorine series gases are used for dry etching.

Highly toxic gases such as phosphine and arsine are used for ion implantation to change the conductivity of silicon wafers, and then high-purity nitrogen, argon, and helium are used for purging protection.

Metal wires are sputtered using high-purity aluminum-silicon targets to form films.

The wet cleaning process consumes ultra-high purity chemicals such as electronic-grade sulfuric acid, hydrogen peroxide, and hydrofluoric acid. Every few steps, the wafers need to be cleaned to remove microparticles.

The quartz and graphite components in the diffusion furnace and deposition chamber are subject to continuous wear and tear and need to be replaced periodically.

In 1993, this 0.5-micron process did not yet employ CMP (chemical mechanical polishing).

Planarization of the interlayer medium is achieved by reflowing phosphosilicate glass and combining SOG spin-coated glass with plasma etching.

It can be seen that the production of chips is not only a complex process, but also requires a large number of different materials.

Furthermore, the requirements for these materials are all at the world's top level.

Currently, domestic manufacturers are still lagging behind in terms of technology.

Asking them to provide materials with a thickness of 1 micrometer would only be barely acceptable; demanding a technical level of 0.5 micrometers is clearly making things difficult for them.

After all, they are all state-owned enterprises. The fact that they have reached this level is already the result of the strong supervision and support given by the former Ministers He and Wang of the Ministry of Electronics Industry.

Otherwise, they might still be clinging to outdated and cumbersome equipment from the former Soviet Union decades ago, lacking any ambition or progress!

Since they all have secure jobs anyway, many people don't even have the motivation to strive for advancement.

Even if a factory is on the verge of bankruptcy, the local government will bail them out for the sake of its political achievements.

With no other option, Yan Jiefang had to take matters into his own hands to ensure that there would be no material shortages in order to keep his company's production schedule up.

Compared to Samsung, the island nation's chip industry was even more advanced at this time.

It possesses the world's most complete semiconductor industry chain at present.

Yan Jiefang felt that he still needed to beg from the island nation for the things he lacked.

So he went directly to the special economic zone and then stored the vast majority of the equipment in the company's factory and warehouse.

To prevent any accidents from happening to these things, he not only blocked all the gates, but also had Yan Xueqian personally lead people to guard the area.

No accidents are allowed to occur.

He then secretly crossed the Luohu Port and boarded a passenger plane bound for the island nation.

Thinking ahead, he even copied a set of aircraft piloting knowledge from the co-pilot's mind.

The system prompted him that he had learned to fly an airplane 30/100.

Although the ability to copy knowledge cannot fully reach the level of the co-pilot, the difference will not be too great.

It seems the co-pilot's piloting skills are rather average.

To avoid any accidents, he did not copy the captain's knowledge during the flight.

The flight took about 4 hours to reach Narita Airport.

After the plane came to a stop, the captain also couldn't escape being fleeced.

Yan Jiefang's driving skills have improved to 50/100.

For the next few days, he traveled around the island nation like a bee.

Shin-Etsu, Sumitomo, Ohka Kogyo, JSR, HOYA, Nikon, NEC, Toshiba, Hitachi, Fujitsu, Mitsubishi Electric, and other companies have experienced large-scale loss of advanced equipment.

Large numbers of police and Self-Defense Force personnel took to the streets to investigate all strangers, and even some flights were delayed as a result.

In particular, all passenger flights from island nations to the mainland have been grounded.

However, these things had nothing to do with Yan Jiefang.

His space is almost full again.

Fortunately, all our objectives have been achieved, so there's not much point in staying here anymore.

He used tricks to board a plane back to Hong Kong.

Just like before, this time I was traveling in a Boeing 747-400.

He had originally planned to destroy some planes as backups, but then he realized that his space was only so big, and if there were too many planes, he definitely wouldn't be able to fit them all in.

In addition, given that such a large aircraft had no airport available for him, he abandoned his plan to launch a critical hit.

If it were a smaller private jet, he might be interested in playing around with some.

These large passenger planes are unnecessary.

As he was leaving the airport, he noticed a row of luxury cars passing by on the road ahead, wondering who they were picking up.

This matter had nothing to do with him, and he didn't care.

However, one of the Mercedes-Benz W140s caught his eye.

This car is the classic "W14" Mercedes-Benz that everyone talks about.

You successfully landed a critical hit on a Mercedes W140, obtaining 66 Mercedes W140s.

After acquiring the new 66 W124s, the previous 80-plus W124s were no longer of any use to him; he figured he might as well sink them into the sea sometime.

He looked up and around, and a row of messy buildings not far ahead caught his attention.

That's the Kowloon Walled City, a common sight in Hong Kong movies.

I heard that demolition and reconstruction have already begun.

He had no intention of going over to take a look, so he hailed a taxi and headed back to Luohu.

After returning to the factory, he told his eldest son to go home and rest, and that there was no need to guard the area, as the factory security guards would be able to keep watch.

He scanned the area with his divine sense and quickly toured the entire factory area.

With such tight security, there was no trace of anyone entering the factory.

Yan Jiefang was very satisfied.

In fact, even if only factory security guards are assigned to guard the area, it would be very difficult for anyone to enter the factory and touch these things.

After all, his factory area is not large, and the distance between the factory buildings and the outer walls is also far.

There are also security guards, all of whom are veterans, making the defense extremely tight.

That day, Yan Jiefang found Manager Xu and asked him to call the municipal government to arrange two stable 66KV high-voltage transmission lines for the factory area.

Manager Xu said he understood and then left the office.

But just half an hour later, he returned and reported back to Yan Jiefang: the municipal power grid could not meet the stringent power supply standards of the eight-inch DRAM wafer fab.

It's not that there's insufficient power generation, but rather that the power grid's redundancy, power quality, and disturbance rejection capabilities do not meet the special power supply standards of high-end semiconductor factories.

Yan Jiefang had not considered this matter beforehand and did not expect such restrictions.

Indeed, there is still a significant gap between a 1-micron wafer production line and a 0.5-micron one.

This issue is unlikely to be resolved in the short term, so we must find another location to build the factory.

Beijing, Shanghai, Guangzhou, Nanjing, Wuhan, Chengdu, Luzhou...

Several cities in China that had developed relatively well flashed through his mind.

The capital, Guangzhou, and Nanjing were immediately ruled out of his mind.