Siheyuan: Starting from a fitter

Chapter 139 Inspection by Ministry Leaders

After everyone dispersed, Wu Liankui pulled Li Guocheng into the conference room.

"Old Li, I'm familiar with the reception process, but I'm not familiar with how to introduce it. Then we will divide the work, I will be in charge of the reception, and you will be in charge of the technical introduction. How about it?"

Li Guocheng thought for a while, "I will know roughly what is going on tomorrow, but I will not participate in the later study tours, so you have to study hard. It is actually simple. You will remember it after watching it a few times."

Wu Liankui was also overwhelmed thinking about the possible follow-up situation, but there was no way, this is the situation now.

"Then let's prepare separately. I'll arrange the reception, and you can think about the technical introduction." Wu Liankui thought about the tight time and hurriedly separated.

Li Guocheng thought about it and felt that it would be more reasonable to introduce it while operating.Because the technical review has not been completed, chip preparation is now on hold.For inspection, the entire production line needs to be started.Thinking of this, I summoned everyone from the semiconductor laboratory.

"We will receive the reception tomorrow and we will do the actual operation. Zhang, you are responsible for preparing the single crystal rod. Are there any problems?"

Zhang Tou has experienced hundreds of battles and is not afraid at all. "No problem!" He spoke loudly and forcefully.

"Zhou Xiaojuan is in charge of cutting, and Wang Dayong is in charge of grinding. Do you have any questions?"

"No problem", Zhou Xiaojuan has seen the world because of family reasons, Wang Dayong is definitely Wang Bold, Li Guocheng is a little worried.

"Xiao Zhou, you will accompany Wang Dayong to grind 10 wafers later. Be sure to install the dust cover in place, otherwise, there will not be enough time to clean the room. You should pay more attention to remind Wang Dayong tomorrow."

"Okay." Zhou Xiaojuan didn't hesitate, but Wang Dayong was a little unhappy, but Li Guocheng didn't bother to talk to her.

"Yan Jiefang is responsible for the operation of the photolithography machine, and Zhang Zhijing is responsible for the etching machine. You have no problem, right?"

"No problem", the two of them are more reliable, as long as they operate according to the process, it is not easy to make mistakes in their work.

"After visiting the wafer preparation, master, you have to change duties and be responsible for packaging. Zhou Xiaojuan is responsible for testing. There is no problem."

"This, I'm not familiar with the assembly", he opened his head in disbelief.

"I don't know how to test," Zhou Xiaojuan also raised objections.

"I'll teach Master Zhang how to encapsulate it later, and then teach Xiao Zhou how to test it. It's not too difficult. The key is to be careful."

"Okay, everyone, practice more today. Don't panic even if you make mistakes during the operation tomorrow. They won't understand it anyway."

Everyone was amused by Li Guocheng. Thinking about it, it seemed that it was really the case, and they seemed to feel less panic.

After the meeting, the entire dust-free laboratory became busy. Li Guocheng kept shuttling in front of various processes, solving or answering various questions.

The whole process was busy until after 8 o'clock in the evening, and everyone went home one after another.

The next day, the entire rolling mill was relatively quiet, because the Ministry called last night and refused to receive it with any fanfare.Early in the morning, Wu Liankui led people to tear down the banners that had just been set up yesterday, as well as the slogans on the road.Only one banner is kept at the door of the dust-free workshop.

At around 10 a.m., a bus stopped directly in front of the laboratory, and everyone got off the bus.

There were not many people coming, only 12 people, all leaders of the Electrical and Mechanical Department, and Father Zhao was among them.There is a reporter and a cameraman in the team.

After some pleasantries, several people changed into dustproof clothing and put on masks as required.Just this level made the inspectors stunned, wondering when they had ever seen this before.The more elegant part is a white coat, here is a one-piece dustproof suit.

Everyone did not enter the workshop, but just went through the process of changing clothes and blowing hair at the door. They looked professional in every aspect, and they admired this dust-free workshop in their hearts.

Entering the spacious workshop, looking at the transparent workplace and bright environment, everyone's inner evaluation has been raised to another level.

"Come on, Xiao Li, the follow-up introduction will be left to you, the leader of the semiconductor experimental group." Li Huaide greeted Li Guocheng to come out and introduced his identity to everyone.

"Hello, leaders, welcome to inspect the dust-free workshop of our semiconductor laboratory. This environment is all designed, designed and constructed by our worker brothers themselves. It can be said to be the first of its kind in China, and it is estimated to be comparable to foreign countries. let".

Everyone looked happy when they heard this, and reporters were busy recording and taking photos.

"Dear leaders, we call this workshop the post-production workshop, which is mainly responsible for chip packaging and testing. I will introduce you to the specific work here later. Please follow me." Li Guocheng introduced everyone to the wafer preparation workshop.

"Please see, this piece of equipment is also the vacuum pulling furnace studied in our laboratory. The vacuum degree is as high as negative 5th power. It is mainly responsible for the preparation of single crystal rods. Now Comrade Zhang Tieniu is using the straight pulling method to prepare single crystals. Great. Everyone looks in from this observation window. Isn’t it very beautiful and charming?”

Under Li Guocheng's introduction, everyone took turns watching the lifting process through the observation window.I was very nervous, but fortunately there was no problem.

During the crystal pulling process, the bright light formed at the interface between the solid crystal and the liquid melt appears brilliant and colorful.Everyone who watched was fascinated and amazed.

After everyone watched, Li Guocheng guided everyone to the slicing area, grinding area and oxidation area, introducing the working principle and function of each process.

When everyone came to the lithography machine and looked at the purple light emitted by the lithography machine with a very modern industrial aesthetic, the purple light irradiated on the photoresist to form complex patterns, which made everyone even more amazed.

Yesterday, Li Guocheng replaced the casing of the photolithography machine to avoid trouble. The surface was treated with brushing technology, which is low-key and luxurious.

He took out a prepared mask and handed it to Dad Zhao, "This is the internal structure diagram of the radio-specific chip." After everyone took turns to read it, Li Guocheng continued: "Everyone, please look here."

With that said, Li Guocheng took off the casing of the lithography machine, and the structure inside could be seen at a glance.

"This is the mask that everyone holds in their hands. Parallel purple light passes through the mask, passes through the precision lens group here, shrinks the pattern, and then irradiates onto the photoresist. Through a chemical reaction, the irradiated part is exposed and hardened. This process It’s similar to the principle of a camera.”

Li Guocheng picked up a wafer that had been exposed and came to the etching machine.

"This is etching equipment. First, you need to put the exposed wafer into this liquid and soak it for a certain period of time to wash away the unnecessary photoresist. Then put it into the middle liquid and etch it to get the desired result. Chip Structure".

Li Guocheng demonstrated one by one. During the process, he put the sample in front of everyone's eyes and handed over a magnifying glass for everyone to observe.Everyone was deeply shocked when they saw the dense and fine carvings on it.

The following thermal spreading process only introduces the principle, and then takes the spread wafer to the post-production workshop, slicing, packaging, and testing. All processes are introduced in detail.

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(End of this chapter)