After Zhang Yifan left, Chen Zhou went to the bathroom to take a shower.

He was not planning to go to bed, but he would sort out the entire contents of the preparation process later, so that he could fall asleep after falling back.

Chen Zhou will sort out the information sent by Zhang Yifan and Shen Jing again.

On the one hand, take the essence of the essence.

On the one hand, verify your research ideas.

Originally, Chen Zhou planned to fully understand all the preparation processes of diamond films and start with them.

Take advantage of the various processes and try to combine them with optimized ones.

However, this method is too difficult.

In a short period of time, it was impossible for him to do it.

Take one of his ideas at the beginning, which is to use the quality of diamond film preparation by the mpcvd method and the speed of preparation by the dapcvd method.

It seems beautiful, but there are endless problems.

If it were not limited to time, Chen Zhou would rather study more.

But now, he plans to put this idea aside.

Starting simply from the improvement of the mpcvd method.

If you have the chance in the future, try an organic combination of the two.

After taking a shower, Chen Zhou looked at the time and it was not yet three o'clock.

He thought about it and set an alarm clock at 3:30.

In more than half an hour, it was almost enough for him to sort out the complete information.

What he needs now is reference and evidence of data.

Although the equipment, equipment, preparation parameters, etc. of each laboratory are different.

However, in the face of the powerful trial and error tool of the wrong question set, these are not problems.

On the contrary, it is of great reference significance.

When the alarm clock rang, Chen Zhou just stopped writing.

He smiled slightly, as expected, the time was just right.

After saving the information on the computer, sorting out the draft paper, Chen Zhou climbed onto the bed and went to bed.

The next day, at 7:30 in the morning, Chen Zhou got up.

Although she only slept for four hours, Chen Zhou's mental state was extremely good.

After turning over and getting out of bed, Chen Zhou washed up briefly, and went to the hotel restaurant to settle for breakfast.

Then he returned to the room and hung a sign of Do Not Disturb at the door.

Today, he has to devote himself to the research on improving the preparation process.

However, as soon as Chen Zhou turned on the computer, he heard a knock on the door.

With a slight frown, Chen Zhou got up and opened the door.

Outside the door, Zhang Yifan was standing.

Seeing Zhang Yifan, Chen Zhou immediately understood. He smiled and asked, "Why don't you sleep more?"

"I can't sleep..." Zhang Yifan hesitated slightly and finally said, "I have participated in the teacher's topic once, but it is far less nervous than you. How can I say it, it's very fulfilling and exciting..."

Chen Zhou joked: "You want to be nervous and exciting, right?"

Zhang Yifan: "Uh...almost..."

Chen Zhou glanced at Zhang Yifan: "I'm sure I won't have a rest?"

Zhang Yifan shook his head: "I really can't sleep..."

"Okay," Chen Zhou let Zhang Yifan into the room, "Then help me build an analysis model."

Zhang Yifan was stunned and asked weakly: "What analysis model?"

When Chen Zhou saw Zhang Yifan's hand opening the computer, he paused obviously and immediately smiled and said, "Don't worry, it's very simple."

As he said that, Chen Zhou walked back to his computer and threw yesterday's research results to Zhang Yifan.

Immediately, he threw another contact information to Zhang Yifan.

Zhang Yifan said strangely: "Who is this person?"

Chen Zhou replied: "A senior from Yan University's Computer Science Department, you two work together to develop this analysis model."

Zhang Yifan said oh, and then added the other party's contact information.

Only then did he realize that Chen Zhou had pulled someone again without realizing it.

This person is not someone else, and the third person in the official upc competition, Fang Jieming.

Originally, Chen Zhou was just trying it out to see if the other party was willing to help.

But what Chen Zhou didn't expect was that Fang Jieming agreed readily.

While being surprised, Chen Zhou also thanked him repeatedly, and mentioned the matter of urging together.

However, Fang Jieming quickly said, "I'll quit."

I haven't played since the last upc ended...

After Zhang Yifan and Fang Jieming contacted, the two began to build the analytical model.

This is a very simple model. According to the two people's estimates, it can be done in more than two hours.

Chen Zhou also opened the information he had sorted out before going to bed last night again.

Based on the trial and error ability of the wrong question set, the parameters of the preparation process are constantly adjusted.

"Diamond preparation process, at high methane concentration, there will be a large amount of carbon and hydrocarbon precursors on the substrate surface, and the mobility is low, and the supersaturation of the carbon and hydrocarbon precursors on the steps is high."

"During the migration process of the carbon and hydrocarbon precursor on the steps, it is very easy to agglomerate with other carbon and hydrocarbon precursors and nucleate."

"At the same time, in places where there is no migration or less migration, the carbon and hydrocarbon precursor will be incorporated into the crystal."

"So, as methane concentration increases, it will eventually lead to irregular growth morphology."

When Chen Zhou thought of this, he wrote on the draft paper:

[When the methane flow rate is low and the diffusion length of the carbon and hydrocarbon precursor is greater than the width of the step, the supersaturation of the adsorbed substance on the ladder will be lower than the critical value required for nucleation.]

[In this case, the carbon and hydrogen precursors reaching the laminar layer will diffuse to another step, thus forming laminar flow growth. Laminar flow growth can produce a single epitaxial surface result, which is suitable for the preparation of single crystal diamonds.]

[Therefore, on the premise that the substrate has been selected, appropriate reduction of methane concentration can effectively inhibit irregular growth, promote laminar flow growth, and increase the growth time and thickness of higher-quality diamond epitaxials.]

After writing this passage, Chen Zhou looked back and wrote a interval beside him.

【2%~9%】

This is the preliminarily proposed methane volume fraction and the wrong interval.

With the same idea and the same method, Chen Zhou determined the trial and error intervals of working pressure, microwave power and substrate temperature.

However, it still takes time to find the most suitable parameter in this batch range.

As Chen Zhou thought before, the diamond preparation process itself is a contradictory issue.

Its growth rate will increase with the increase of methane concentration, working pressure and substrate temperature, etc., but excessive methane concentration and substrate temperature will reduce the quality of diamond.

At 11 a.m., Zhang Yifan and Fang Jieming completed the analysis model.

Chen Zhou casually gave the two of the data parameters that were tried and missed through the wrong question set, and asked them to further analyze through the analysis model.

The analysis model can initially obtain the theoretical results of the current data parameters, which is considered to be a further verification of trial and error of the set of right and wrong questions.

Through this feedback information, Chen Zhou adjusted the trial and error interval and used the wrong question set to verify it.

After that, hand over the data to Zhang Yifan and Fang Jieming.

In this way, the cooperation between the three became more and more tacit understanding.

The improvements in diamond preparation process are also solving the expected goals.

At one o'clock in the afternoon, after a short rest, Chen Zhou and the other two started to work in the follow-up work.
Chapter completed!