Siheyuan: Starting from a fitter

Chapter 131 Circuit Board Design ([-])
The next day at work, the three of them were busy. Yan Jiefang wanted to ask Li Guocheng to help him make a stent, but Li Guocheng kicked him out.

Now Li Guocheng is busy polishing the first radio casing, scraping along the grain of sandalwood with a carving knife.The finished part feels very clean, not too dazzling, calm, atmospheric and natural.

After everything was completed, I took out a slightly inferior piece of sandalwood and started carving the second radio box.

Finally, at around 2 p.m., the carving of all three radios was completed.

I went in and looked at the progress of the two girls. I felt that everything was completed, and I just needed to do the final repeated verification work.After all, there are data and ratios for chip photoresist and etching machines. Making a solution ratio for a circuit board can be done as long as you are not too stupid.

Now the two girls were trained by Li Guocheng according to the rigorous process of later generations' experiments. He taught them some easy-to-understand knowledge in a short period of time, and the two of them kept up with it and basically absorbed it.

The ratio of circuit board solutions was a quiz for them, and the results were very good, indicating that they had fully understood similar chemical reactions and ratio techniques.

Before getting off work, the three of them came to Li Guocheng's workstation exhaustedly and reported the results.

"Not bad, I'll give you 60 points. Pack it up and get off work. We will verify it together tomorrow."

Listening to Li Guocheng's neither salty nor indifferent comments, the three of them were filled with excitement and shock.Especially Zhang Zhijing, with tears in her eyes.

At this time, Zhou Xiaojuan was still able to control her emotions well. She said yes and pulled the two of them out of Li Guocheng's laboratory.Zhang Zhijing cried at the gate.

"To be honest, I feel uncomfortable too, but think about it, the current ratio was earned by Brother Li with his life. We have made some deletions based on his work. There is really nothing to be proud of. We must learn more in the future. Practice more and follow him closely. One day you will catch up with him or even surpass him."

Zhang Zhijing suddenly burst into tears and smiled, "I really shouldn't be so fragile, thank you, Sister Zhou."Yan Jiefang didn't react much at first, but now his eyes became firmer.

Hearing their conversation, Li Guocheng smiled happily, "The children have grown up!", but he seemed to have forgotten that his physical age was now the same as theirs.

The next morning, there were only four of them in the laboratory, Li Guocheng.Li Guocheng took out the copper plate he had carved yesterday and handed it to Yan Jiefang.

"Expose the circuit boards first and make five first," Li Guocheng said very casually.

"Ah, I'm coming!" Yan Jiefang was a little at a loss.

"Yes, there were detailed steps on how to make the circuit board before. The three of you can just discuss it together."

Li Guocheng spoke casually, but he was also a little nervous inside, fearing that it might undermine the situation.But they will eventually have to be on their own, and letting them do some challenging work on their own is very good for building their confidence.

If Li Guocheng completes the entire production process first this time, and then they imitate it again, their sense of dependence will be strengthened.If you want to be independent in the future, you will need to put in more effort.

Li Guocheng sat directly at his workstation and drank tea, ignoring them.

The three of them looked at each other, walked to the experimental table silently, and started the experiment.

Li Guocheng released his directional mind and paid attention silently.

At this time, the trio was composed of Zhang Zhijing holding a notebook and reciting the steps, Zhou Xiaojuan handing things over, and Yan Jiefang doing the exercises.

Clean the surface of the circuit board, apply photosensitive ink, dry the filament, clamp the copper mask, expose with purple light, soak in etching solution, clean, dry, apply protective oil, tin plating, and hot press.

Three people completed the 11 processes in a hurry, scrapping the machine 5 times, and none of them were successful.When they saw Li Guocheng's indifferent expression, the three of them secretly gritted their teeth, analyzed together, and slowly improved.

Finally barely succeeded on the sixth try.Looking at the colorful circuit boards in their hands, the three of them were very happy and passed their joy to each other.

At this time, Li Guocheng came over without saying a word. Starting from the first process, he used the most perfect technique to complete 11 processes. The surface of the finished board was clean, the protective oil was evenly applied, and the solder pads were smooth and full without any stains. Impurities left over from a process.

Then he handed it to the three of them, returned to his work station, and continued to drink tea and take a nap.

In fact, all their processes were recorded by Li Guocheng, and he remembered the easy mistakes, and continuously optimized them in his mind, so that he could operate smoothly just now. In fact, he only had it by standing on the shoulders of their "three giants". Such skillful movements.

The three of them compared the two circuit boards and were no longer in the mood to complain. The contrast was too strong.

The three of them started trying again, and finally before leaving get off work, they came over nervously with 5 circuit boards that they were quite satisfied with.

I took over 5 circuit boards and watched them carefully and repeatedly. "It's very good. The first time I did it, it exceeded my expectations. To be honest, if I didn't have experience in chip production, I would really be inferior to you."

The three of them listened to Li Guocheng's words in confusion and couldn't believe that it was Li Guocheng who said this.

The three people exchanged glances repeatedly. In the end, Zhou Xiaojuan took the lead and walked back to the workbench, followed by the other two.

Zhou Xiaojuan picked up the circuit board that Li Guocheng had just finished and compared it repeatedly with the five circuit boards they made. It seemed that one of them was really different from the one Li Guocheng had made.

After the three of them repeatedly hinted to each other several times, they all confirmed their feelings. Although the three of them were excited, after being hit by Li Guocheng many times, they did not jump up and down like before. Instead, they looked at each other, and then made low noises. A low laugh, as if Erha had just eaten a chicken leg.

In fact, this is the method that Li Guocheng is best at cultivating talents in later generations. He sets a very high goal, and when the other party is close to completing it, he gives appropriate pressure. Then when the other party holds his breath and completes it, he subconsciously feels that it is not good enough. If they are given pertinent affirmation at this time, they will feel that this success is not worth showing off, but will calm down and start another challenge.

After a few years or more than ten years, they will suddenly find that they have reached the highest point.If they still have energy, they will habitually start climbing to unknown targets in the distance.

You can regard this as the ruthless exploitation of capital.But it is undeniable that as long as they persist, they will grow faster and stand taller than their peers.So Li Guocheng defined it as a win-win situation.

Several people went home with strange moods, but when they met their family members, they couldn't help but show excitement, but they could restrain themselves and talk about the day's past.Of course, what cannot be said will definitely not be said. They have naturally used their profession to restrain themselves. The word profession is something that Brother Li has repeatedly emphasized.

"Well, it's strange. Why do you think about Brother Li's point of view again? It's really annoying." Then he went to sleep with a smile on his face. After all, he was very tired today.

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(End of this chapter)