The ups and downs of life in the Siheyuan

The little girl pouted, not even bothering to challenge her second brother to beat him like before.

There was only an ouch, and the second brother was pinched by the second sister-in-law, and he was holding his waist and gasping for air.

"Yes!" Yang's mother looked at Brother Yang with a dark face.

"Mom, Li Yuan is very handsome and has a good personality. He looks like a teacher."

"That's right, college students at Huaqing University are not allowed to be polite and quiet," Mrs. Yang showed an envious expression.

"Dinner is so good. Your cooking skills are much better than mine." Yang Ting immediately shut up and almost said the word "Mom".

"What can you tell me?" Brother Yang came forward again, and the others were also curious.

When Yang Ting finished speaking, the whole family was almost drooling.

"Okay, he seems to be a generous master, and the blind dates are so rich," Brother Yang nodded.

"Well, next time you go on a blind date, my second brother will go with you and help you check."

Yang Ting's eyes widened, "Second brother, are you stupid? Our blind date is over, and we will talk about marriage from now on."

Brother Yang suddenly reacted with a bitter look on his face, as if he had lost a hundred yuan.

But thinking about the many opportunities in the future, he smiled again.

The whole family is very concerned about the blind date, and no one cares about the psychology of Brother Yang.

Then he turned to the house.

When they heard that it had been renovated into two floors with an independent kitchen, the whole family was amazed and wanted to go there right away to see what their future sister's home would be like.

Li Yuan returned home and was not harassed by Widow Qin again until he went to bed.

He knew that this must be Director Wang's credit.

I'm thinking of going to Director Wang's house over the weekend and giving him something as a token of my gratitude.

At noon the next day, just after lunch, I met Director Wang again.

"Xiao Li, how are you? Do you like it?"

"Good".

"That's good, that's good. Let's get married as soon as possible."

"Why don't we do it again after the New Year?"

"No, just a few years ago, I knew the details about this girl, and she was a real person from top to bottom in the family.

Neighbors also speak highly of her, and she rarely blushes with anyone.

The girl had just graduated and was very popular in the workplace.

If you have a good figure and a big butt, you will be able to hold a big fat boy in your arms next year.”

Director Wang smiled happily, as if this marriage was her own.

"That, I don't understand either, look at this..." Li Yuan raised his question until he couldn't avoid it.

Director Wang thought about it and said, "Okay, I will treat you as your elder. No problem, right?"

"You can't ask for it".

"Okay, I'll take care of the wedding for you. Just wait to get the certificate, pick up the bride, and enter the bridal chamber."

Director Wang left in a hurry.

Li Yuan looked at her back and felt that his youth had been taken away by her.

Back in the laboratory, Li Yuan put aside the matter for the time being and devoted his energy to work again.

The next step is the wafer oxidation process. Li Yuan has to do this step himself.

First of all, let's take everyone to study cleaning solutions. At present, the best ones are acid, alkali and alcohol solutions.

All three solutions can effectively remove various contaminants on the wafer surface. The problem is that they will cause certain corrosion on the wafer surface and affect subsequent processes.

Through repeated experiments and comparisons, absolute ethanol was chosen. Compared with the above two, the cleaning intensity is not as strong, but it is enough for now.

After cleaning, a cleaning process with alcohol is also required, and rinse directly with distilled water.

Then put it directly into the oxidation furnace and start oxidation.

There are two methods of oxidation mentioned in the skill book: dry oxidation and wet oxidation.

Dry oxidation, pure oxygen produces a silicon dioxide layer, which is slow but the oxide layer is thin and dense.

Wet oxidation requires the simultaneous use of oxygen and highly soluble water vapor, which is characterized by fast growth but a relatively thick protective layer and low density.

With the current technology, the maximum processing accuracy is maintained at the millimeter level, and dry oxidation is of little significance.

Therefore, the relatively economical and affordable wet oxidation method is chosen.

When I was about to start oxidation, I realized how stupid I was to choose a vacuum furnace.

At first, only the dust-free effect was considered, but the oxidation process was not considered.

Therefore, the final vacuuming function of the oxidation furnace became a decoration.

Fortunately, it has good sealing performance and can be used as an oxidation chamber.

The next step is to start exploring the oxidation process.

The oxide layer of the first wafer is too thick, which is not conducive to later processes, and the oxide layer of the second wafer is too thin.

It wasn't until the 8th film that I found the best process.

After the curing process, Huang Yan verified it and obtained a wafer that met the requirements.

At this point, the four main processes of single crystal rod preparation, cutting, polishing and oxidation have been solidified.

Re-revise the design drawings, design documents, and process flow and compile them into a volume.

At this point, high-quality wafers can be provided to users and technology can also be transferred.

During the trip, Director Wang took him to his father-in-law's house twice.

The process was relatively smooth, not only was there no embarrassment, but there was also a feeling of being taken away quickly.

The betrothal gift is only a symbolic 10 yuan, and the other three rings are just one ring away.

Radio is no longer a problem for Li Yuan now.

Director Wang only wanted 20 eggs and refused to accept the others, which made Li Yuan feel embarrassed.

A busy month has passed, and the two of them have only met a few times in private.

Unfortunately, the little girl is a conservative person, and the most she can do is go to the park.

Every time she talked about sitting at home, she refused to go.

On this day, the superior notified the leaders to inspect next Monday.

Li Yuan was not immune and notified substations and underground laboratories to improve their hygiene.

As for the maintenance shop, everything is quiet. Every day, some tractors and motors are repaired, and there is very little other work.

Liang Zhixiang also felt that something was wrong with Li Yuan now. He tried to communicate several times but couldn't find anyone.

When he went to work today, he kept following Li Yuan, which made Li Yuan realize that he had ignored them.

Liang Zhixiang and Yan Jiefang were originally here for him.

It really shouldn't be right to leave them in the repair shop and ignore them now.

"Zhixiang, come and try this Dahongpao, this is a rare tea."

Liang Zhixiang took a sip and praised it, obviously absent-mindedly.

"I apologize to you first. I really didn't bother to go to the repair shop at this stage. It's hard to tell you why.

But since you believe me, I will think about your way out next.

I will add a promising business to the repair shop, but I don’t have much time to participate. In the future, you have to help me support this factory.”

It's not like he hasn't considered absorbing them into the underground laboratory.

However, their academic qualifications are too low, and it is a bit difficult for them to learn semiconductor knowledge.

When Liang Zhixiang heard what Li Yuan said, he said, "Yuanzi, you know my character. As long as you tell me, I will implement it to the letter."

Li Yuan nodded, "Zhixiang, give me some time, up to 1 month, and I will give you the result."

"No rush, you are busy with your business, I just stare in confusion every day and feel panicked.

There is no problem now, as long as you are willing, no matter how long it takes, I have the confidence in my heart."

"Okay, if you have time, you can talk to Jiefang."

"Do not worry".

After settling a matter on his mind, he came to the underground laboratory again.

Go through the process to be demonstrated with everyone again to make sure there are no mistakes.

The aroma of wine is also afraid of deep alleys. They need to seize every opportunity to show their leaders that in their underground laboratory, the country has not lost money on its investment, and it has made a lot of money.

All preparations are completed, just waiting for the leadership inspection the day after tomorrow.