It's already nine o'clock in the evening, but the lights in the chip workshop are still bright, and it looks like it's going to work for a hundred days.

Xiaopo was a person trusted by the workshop director, so he gave him the key and asked him and others to take turns opening and locking the door.

When the security guard saw it was Xiaopo, he didn't stop him and just asked.

Small ramp: "This is Li Sanbiao, newly transferred to our workshop. Let's get familiar with the environment first."

The security guard said "Oh" and didn't care. He wrote down his name in the book and also marked his identity.

Upon entering the workshop, you will be sprayed with disinfectant first.

Then there was a protective airtight door unique to civil air defense projects.

Passing through a negative pressure channel more than ten meters long, the blower blew away the dust from his body.

Then there is a strong airtight door,

Change into dustproof clothing and a mask in the next room.

Then, there is another negative pressure channel that is exactly the same.

Xiaopo explained that in the 1970s, the factory spent 3 million to buy clean air conditioners from Oriental.

But the chips are always not up to standard. In summary, there is too much dust.

The Japanese said that there was too much dust in Sijiucheng, and they had to build an extra cleaning entrance and charge another two million.

Of course we would not agree. We found the chemical defense troops and used the troops' civil air defense and sheltering equipment.

The Toyo engineers who came to provide support laughed at the fact that these backward chemical protection equipment were similar to the pig-nosed masks they made during World War II, and it was impossible to use them in tall chip factories.

When Teacher Xing was at a loss what to do, he suddenly remembered a sentence from "On Contradiction":

"Quantitative change determines qualitative change, and quantitative change is the necessary preparation for qualitative change"

Our cleaning equipment is really not good,

Then use the stupid method of Yu Old Man Moves Mountains. Others disinfect once, and we disinfect twice or three times. Isn’t it enough?

The Dongyang engineers were shocked. After listening to Teacher Xing's lecture on "On Contradiction" and "On Practice", they suddenly understood and took them back home to study.

Li Sanbiao lamented, indeed, Chinese people have many ambitions and can overcome difficulties.

After opening the last airtight door and stepping into the factory, Li Sanbiao's eyes froze.

This workshop covers an area of ​​6,000 square meters, which is 60 meters wide and 100 meters long. It is extremely large.

The sand is transported in and chips come out. It is one of the few factories in the world that has a complete set of processing equipment!

Most of them are processed separately, but what Long Guo wants is a complete set.

The room is filled with sophisticated and beautiful photolithography equipment.

Black and white microscopes are everywhere on the equipment, and there are three or four eyepieces on one microscope, which cannot be switched and rotated under manual operation.

The deep purple rays emitted by a machine shrouded a white chip in purple light.

That is the lithography machine of this era!

One by one, Bai Bai was carefully picking up the chip with tweezers under the microscope and soldering the pins.

If you film this place and show it to others, most viewers will think they are in 2022!

It’s unimaginable that this was 40 years ago!

Xiaopo introduced that chip production is roughly divided into three parts.

One is wafer manufacturing, and the other is mask manufacturing.

The third is photolithography and test packaging.

Wafers are the simplest. A few people put ordinary sand into a quartz crucible, smelt and purify it.

Then the machine goes straight up and pulls out a cylindrical silicon column.

It's like pulling a piece of shredded sweet potato out of the pot, with silk underneath.

Then, the cylinder was cut back and forth by several thin steel wires.

The cut circular slices are wafers!

Li Sanbiao thought for a long time, wondering where he had met...

Well, this wafer actually looks exactly like the cod fillet in the supermarket.

Just as Li Sanbiao wanted to take it away, a few Dabai picked up the wafer and put it on another polishing production line with seven or eight processes.

After being inspected by some female workers under a microscope, the qualified wafer is considered a finished product.

Li Sanbiao even thinks that as long as you have good hands in wafer manufacturing.

"Boss, wafer production equipment has been detected. Do you want to analyze it?"

"Yes, parsing..."

"Parse successfully..."

"Generate parsing file!"

Li Sanbiao walked to the photolithography area on the other side. The machines here were all industrial crowns, which he wanted to analyze most.

It would be great if one could be made.

"Discovered mask production equipment!"

Several Dabais are using chemical vapor deposition to purify glass in a vacuum environment to create masks for photolithography.

Another group of workers, under the command of a middle-aged man,

Put the completed mask into a vertical laser engraving machine for engraving.

"Hurry up, we need this right away!"

"Pay attention, you have tried it several times..."

Fu Gong angrily yelled: "Don't talk nonsense to me! We will definitely succeed this time!"

The worker quickly started the machine, and a laser beam began to scan the mask, carving out the circuit diagram designed by the man.

"Do you want to analyze the mask production device?"

"Do you want to analyze the laser engraving machine?"

"Parse successfully!"

Follow the workers just now and come to the photolithography area.

The workers used the newly carved mask as a negative and placed it on the upper layer.

Put the wafer on the lower layer as photo paper and put it into the photolithography machine together.

The middle-aged engineer also came and pressed the button himself.

"You're so cute, if you don't do anything right, I'll smash you!"

The laser head of the lithography machine suddenly lit up, with a strong purple light and a haze of light.

The principle of photolithography is like exposing a photo. The laser beam passes through the mask and scans the wafer.

A stream of green smoke immediately rose from the wafer,

After a few seconds, the circuit drawn on the mask was copied onto the wafer.

At this time, the wafer can already be called a chip.

This is not over yet, the chip is put into the etching machine again,

Countless mechanical syringes are like chickens pecking rice, according to the predetermined design,

Rapidly and continuously inject boron and phosphorus impurities into the chip,

Let the chip form countless transistors.

Then someone started soldering pins to the chip.

Li Sanbiao visited the chip manufacturing process,

The system analyzed the entire chip production line all the way down to the smallest components.

"Whether to analyze the lithography machine"

"Analyze photoresist?"

"Do you want to analyze chip etching materials and etching machines?"

"Do you want to analyze the chip packaging and testing machine?"

"Parse successfully!..."

At the same time, the chip has been packaged.

The test worker turned on the laser scatterer and used a high-power microscope to observe the internal structure of the chip.

"There is no problem with the chip itself! The circuit diagram conforms to your design! Finished work and can be tested on the computer!"
To be continued...