Chapter 524

After determining the thickness of the nickel sheet, Gu Lu and Ke Bo began to move on to the next step.

"Next, we need to heat the graphite powder and apply a pressure rating. ”

The purpose of this step is to break down the graphite so that the high diffusivity of the carbon in the nickel allows it to quickly pass through the metal film.

"Then, we need to ...... the nickel sheets"

Gu Lu and Ke Bo operated step by step according to the plan that had been planned long ago.

Half an hour later......

After more than ten steps, Gu Lu and Ke Bo finally obtained a multi-layer graphene covered on a nickel sheet.

After the nickel flakes are removed by a simple etching method, a complete standard interconnect structure of doped multilayer graphene is realized.

Ke Bo carefully picked up the etched multi-layer graphene with tweezers, and a smile appeared on his face, "Professor Gu, we are ...... Did it work?"

Gu Lu leaned closer and took a closer look, and nodded, "It's a preliminary success, after all, this graphene structure doped with multi-layer interconnection is exactly the structure we need." ”

"However, the multilayer graphene we have now should not meet our actual needs. ”

Gu Lu was right.

Ke Bo put the multilayer graphene on a special equipment and observed it, and found that the multilayer graphene obtained by processing just now had only five layers of carbon atoms.

According to Gu Lu and Ke Bo's estimates, in order to construct conductive zero-gap energy bands on the vertical plane of multilayer graphene, the number of graphene layers must reach at least 20 layers.

Moreover......

In addition to the fact that the number of layers of graphene carbon atoms is not up to standard, such multilayer graphene cannot meet the requirements of semiconductor quantum chips in terms of quality.

"Hey!" Ke Bo sighed softly, disappointed, "I thought I could make it in one go!"

Gu Lu didn't have the disappointed mood of Ke Bo.

In Gu Lu's opinion, it is already very good to reach this level in the first experiment.

At the very least, it proves that their theory of 'pressure-assisted solid-phase diffusion' is completely feasible.

Next, it is entirely possible to process the multilayer graphene semiconductor quantum chip that is actually required by adjusting some process parameters, such as the thickness of the nickel sheet.

Gu Lu patted Ke Bo, who was a little depressed, on the shoulder, and smiled faintly, "Where is it so simple, it's just the first experiment, it's already very good to achieve this effect, and then we only need to improve this set of pressure-assisted solid-phase diffusion theory, determine the specific values of some process parameters, and then we can process and produce the multilayer graphene chips we need." ”

Ke Bo nodded, and said in a firm tone, "Well, Professor Gu, I will work hard with you!"

…………

And so the days went by.

Gu Lu and Ke Bo's research work is also progressing steadily.

Through several theoretical derivations and simulation experiments, Gu Lu and Ke Bo have determined the specific values of some process parameters in the production process of multilayer graphene.

For example, the thickness of the nickel sheet should be between 2.5mm and 2.7mm, the heating temperature of graphite powder should be above 300 degrees Celsius, and the pressure should be controlled in the range of 1200~1250kpa.

However, there are still some process parameters that still need a certain amount of time to be calculated experimentally.

As for the team led by An Yu, the progress is a little slower than Gu Lu's.

But not long ago, he also found a practical theoretical scheme, and like Gu Lu's side, he is constantly revising the results through experiments.

In this case, the time came to June 23.

It was supposed to be an ordinary day.

It's not a holiday, and it's not a weekend.

But today is a very important day for many.

Because just this morning, the college entrance examination results of this year's college entrance examination results will be officially released.

This report card that determines the fate of many people will be officially released!

…………

Yanjing, Pan Zuan's home.

Pan Zuan leaned back on the sofa, staring blankly at the Ministry of Education boss on the TV screen in front of him.

According to the practice of previous years, in less than half an hour, the bigwig of the Ministry of Education will announce this year's liberal arts and science scores.

Then, the inquiry channel of each college entrance examination score will begin.

At that time, it will be the day when Pan Zuan will be sentenced.

Judging from Pan Zuan's current appearance and the fact that he has lost a lot of weight, he knows that Pan Zuan has not had a good time in the half month after the college entrance examination.

But that's right.

The math test was a mess, and it was strange that I could live comfortably in the past half a month.

In fact, not only Pan Zuan, but many candidates this year have not been as happy as they imagined in the half month since the end of the college entrance examination.

When I thought of checking the results, I saw my rather stretched score, and the fat house happy water in my hand suddenly didn't taste good, and the games on the computer suddenly didn't play well.

Everyone originally thought that they could carry out the wave after the college entrance examination was over, and they indulged in it.

But I found that before the results really came out, they didn't have the heart to play at all.

Especially the difficulty of this year's math paper, it is simply that everyone does not have the slightest intention of going out to play after the college entrance examination, but stays at home honestly every day, the purpose of which is to create an image of a good baby in the minds of parents, and avoid suffering a mixed doubles of husband and wife after the college entrance examination results come out.

For example, Pan Zuan, before the college entrance examination, Pan Zuan planned to go around as soon as the college entrance examination was over, and the Internet café KTV had an all-night hike every day.

But now, except for going downstairs to help buy some oil, salt, sauce, vinegar and tea, Pan Zuan has not left home for half a month.

And Pan Zuan gets up on time every day, mainly cleaning the house, and he usually doesn't even go to the kitchen, and he also learned to simply fry a few dishes, which surprised Pan Zuan's parents enough, and wondered if his son was taken away by others.

But in fact, this is just Pan Zuan's way back for himself.

"Mom, I'll go to the kitchen and cut a watermelon. ”

There are still more than ten minutes before the release of the college entrance examination results, Pan Zuan found a reason to come to the study, and after cutting the watermelon and placing it in the fruit bowl, Pan Zuan took advantage of the fact that his parents in the living room did not pay attention and hid all the knives in the kitchen tightly.

Pan Zuan is thinking about his own life.

After waiting for the results of the college entrance examination to be announced, Pan Zuan feels that it is very likely to usher in a husband and wife doubles, Pan Zuan is going to hide some dangerous 'murder weapons', otherwise if his parents are hot at that time, they impulsively use a knife to abolish the number he has practiced for 18 years, then who will he find to reason.

Anyway, the dog's life matters!