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

Seoul in 1993 was a highly modernized metropolis.

By this time, the city's population had exceeded 1000 million, the subway network was in place, and elevated roads and expressways were widely available.

This has made transportation here very convenient.

A large number of high-rise apartment buildings have been erected along both banks of the Han River, and Gangnam District has become a core area for the wealthy, with very high housing prices.

The commercial district is filled with high-rise buildings, and large shopping malls and chain department stores have basically covered all areas.

This city has significantly outpaced Beijing, Shanghai, Guangzhou, and Shenzhen in the same period.

At this time, the city still retained its original name, Hanseong.

The name Seoul was changed after the year 2000.

Because of the short distance, Yan Jiefang flew over easily without consuming much spiritual energy.

It was pitch black outside in the middle of the night, but the city was still brightly lit, giving it a somewhat modern feel.

He randomly approached some upper-class people in several high-rise buildings to get information.

They quickly figured out the locations of Samsung's three main factories in China and a large amount of basic information about its senior executives.

These things are just there; as long as one reaches a certain level of understanding within the upper echelons of society, one can basically learn about this information.

He then "visited" several senior executives of various companies, gaining a better understanding of Samsung's current factories.

The factory in Suwon, Gyeonggi Province, began production in 1974 and was responsible for the company's chip research and development and small-scale wafer manufacturing.

The factory in Gumi, North Gyeongsang Province, is mainly responsible for the back-end packaging and testing of chips.

If he has enough spiritual energy, he plans to go and check out the factory in Suwon to see if there is any useful confidential information.

If you have it, take it; if not, it doesn't matter.

If you don't have enough spiritual energy, then forget about it for now.

The most important one is the main large-scale DRAM factory located in Giheung County, Gyeonggi Province.

This is Samsung's most important wafer manufacturing plant for memory chips at this time.

Samsung's mainstream 4MB DRAM is being mass-produced here.

16MB DRAM is also ramping up production on the newly built Fab-5 eight-inch production line.

4M-DRAM is currently the most mainstream memory product, and most 486 computers use this type.

386 computers were also widely used to improve performance.

There is a huge market demand for this product, but it will be phased out soon.

Currently, some of the production lines in his factory that use PAS2500 are mass-producing 4MB DRAM according to customer orders.

However, the PAS2500 has its limits; 4MB is its maximum, and there is no possibility of creating 16MB.

The 0.5-micron process has already exceeded its optical limits.

16MB DRAM is currently the most high-end memory product and represents the mainstream market for the next few years.

What Yan Jiefang wanted was a lithography machine capable of producing these kinds of chips.

Clearly, based on the information gathered, there are definitely high-end lithography machines here, but the number is probably not large.

When he arrived at the location and inspected the entire place, he found that things were indeed as he had expected.

In the corresponding workshop, there are only 8 state-of-the-art Nikon NSR-2005i8A i-line stepper lithography machines.

The yellow area of ​​Fab-5 contains a total of more than a dozen i-line stepper lithography machines.

Eight brand-new NSR-2005i8A units are responsible for the memory array, gates, capacitors, and other critical layers that require high precision.

There are also four older NSR-1505i7 i-line machines of the same series, which are specially designed to handle passivation and protective layers for wider lines.

An eight-inch wafer has 19-21 photolithography mask processes, and each layer requires hundreds of step exposures.

Different photolithography steps on a single wafer are assigned to different machines, rather than being done by a single machine from start to finish.

The photolithography workshop, where the photolithography section is located, only has photolithography machines and matching coating and developing machines.

The entire room was illuminated only with yellow-orange safety lights to avoid damaging the photoresist.

The diffusion, etching, thin film deposition, and wet cleaning processes are all located in the same huge factory building, and are all separated into independent cleanrooms by partition walls and access control.

The crystal boat boxes being processed are transported back and forth by AGV trolleys passing through a clean passage.

Once a wafer has undergone one layer of photolithography, it is sent out of the photolithography room to the adjacent room to complete the etching, thin film deposition, and wet cleaning processes.

Then return to the yellow light workshop for the next layer of exposure.

There are only a few dozen people in the yellow-lit area of ​​this workshop during the night shift.

This small group is much easier to handle compared to the last time we were in the island nation.

A golden light flashed in his pupils, and everyone in this area had their short-term memories altered, falling into a brief coma.

He then immediately cut off the power, and with a flick of his sleeve, all the equipment in the most valuable Huang Guang workshop disappeared.

They didn't even spare the auxiliary equipment.

He then moved to a new location, clearing out all the supporting equipment in the vicinity, including those for diffusion, etching, thin film deposition, and wet cleaning.

These are all things needed in the production process, and it won't be easy to assemble them once they're back in China.

After doing all that, he didn't linger there and flew directly on his sword to the Gumi factory, more than 200 kilometers away.

Fab-5 will not build packaging workshops within the plant area.

The first step in packaging is to cut the wafer with a diamond blade, which generates a large amount of silicon dust and debris.

Once it spreads into the upstream clean area, it will directly ruin the yield of the photolithography process.

Therefore, it should never be placed in the same production plant as lithography machines and etching machines.

It's even best not to place them in the same factory park.

When Yan Jiefang went back to build the factory, he also insisted on building the factories separately, not in the same factory area.

There's no need for them to be so far apart.

A normal interval of 1km or more is sufficient to eliminate all interference.

After a period of flight, he finally arrived over the Gumi factory.

The packaging workshop in Gumi also operates 24 hours a day without interruption, with a large number of workers working the night shift.

Here, an eight-hour shift system is used in three shifts.

Packaging is a labor-intensive process, requiring thousands of assembly line workers for processes such as die cutting, wire bonding, molding, and final product testing.

Here, female workers make up the vast majority of the operators.

Faced with this situation, Yan Jiefang had no choice but to take drastic measures!

Simply select the equipment you need.

Without any hesitation, he moved swiftly, obtaining all the equipment and supplies he needed in less than a minute.

They then left amidst a chorus of piercing screams.

On his way back, he also stopped by the Suwon factory.

After packing up the materials and taking them with him, he crossed the Yellow Sea and returned to Rongcheng City.

The items he received from the two large-scale alms-giving events have almost filled his personal space.

After recovering his spiritual power here in a few days, he will first go to the special zone to set up the equipment for producing silicon wafers.

Otherwise, he would be unable to carry out subsequent actions.