"I went to your classmate yesterday, did his brother say anything?" While eating, Zeng Jianguo asked his younger brother about the national road.

The school is closed, and few windows in the cafeteria are open; In addition, there are few people eating in the cafeteria, and those window things can't be sold all day long, and the hot and cold things are really not delicious, so Zeng Jianguo took his younger brother to the restaurant outside.

Holding a chopstick and throwing the capers into his mouth, Zeng Ziguo said while chewing: "I didn't see him; Brother Ye went out early in the morning and didn't come home in the evening, so Huo Zi was always worried. ”

After swallowing a mouthful of food, he said: "A smell of nitrite, brother, this thing should be eaten less!" ”

When his younger brother said this, Zeng Jianguo's favorite capers in his mouth were not so tasteful, he rolled his eyes and scolded lightly: "You have a lot to do, eat your food!" With your science level of half a pot of water, do you still know the taste of nitrite? ”

"Then don't underestimate me, before the college entrance examination, it is the most knowledgeable time in our lives, knowing astronomy and geography, politics, economy, history and humanities. Maybe you, a former high school student, don't have as much knowledge as I do. "Zeng Ziguo was very skinny when he was with his brother, and he was not as shy as he was in front of outsiders.

After a few idle sentences, Zeng Jianguo said: "Brother, we are about to go to the project there, the department has issued a notice, and the idle people must be avoided, and you can't go to the experimental building of the school for the next period of time; That's all for your work-study program; Take advantage of the winter vacation to take a few days to walk around the city and the surrounding area, and if you want to go, you can also go to Xianyang to see the mud people. But I'm afraid I don't have much time for you. ”

"If you're busy, yours can be busy!" Zeng Ziguo said indifferently: "When the time comes, I'll go and play with the basket, anyway, I don't want to go out alone, just go to the copy shop with him, and study with him by the way." ”

"You're going to the copy shop?" Zeng Jianguo was a little unhappy, he didn't eat anymore, and asked with a straight face: "Xiaozi, you are a person who wants to be admitted to a key university, you can go out and relax, but don't mix with them who run copy shops, it's not good for you." Your key task now is to study and study again, and strive to get a good school in the college entrance examination next year. ”

Zeng Ziguo knew that his brother would say this, so he nodded perfunctorily and said, "Brother, I am measured, don't worry." Besides, Huozi's own grades are okay, and now I have figured it out again, preparing to take the university entrance examination, and studying very seriously; The two of us can encourage each other. ”

Hearing that Ye Jinhui wanted to be admitted to university, Zeng Jianguo asked curiously: "Didn't you say that he didn't want to go to school, and came to Xi'an just to learn typing and copying from his brother?" How did it change here again? ”

Zeng Ziguo shrugged his shoulders and shook his head: "I don't know, I secretly told me on the train that I was going to learn a full set in the copy shop during the Chinese New Year, and I wouldn't go back when school started; As a result, when I went to his place yesterday, I found that he was reviewing texts and making up for his winter vacation homework, which was really weird. ”

"Okay, it's good to be studious! Don't be like his brother, he didn't study well after graduating from high school, he went to open a copy shop, and he was scared with a little money. ”

I don't know why, Zeng Ziguo always feels that the eldest brother doesn't blame Brother Ye for a while, it seems that Brother Ye is very good, where is there anything to do.

It's just that although the eldest brother is biased, he is still his eldest brother, and he can only pretend that he didn't hear what he said.

At this moment, Zeng Ziguo's mobile phone rang, and he took it out to take a look.

"Brother, it was Huozi who called me, I guess he doesn't understand any exercises, I'll answer his phone first."

Zeng Jianguo was noncommittal and ate by himself.

"Hey, Huzi?"

"What, your brother is looking for my brother? Urgent? ”

"Oh, good!"

As he spoke, Zeng Ziguo handed the phone to Zeng Jianguo with a puzzled face, and said, "Brother Pi, Huzi said that his brother is looking for you in an emergency." ”

Zeng Jianguo also didn't know why, and after swallowing the food in his mouth, he took the phone.

"Hello?"

On the other end of the phone, Ye Jinyu was very anxious to wait for the reply on the phone, he was so inspired after hearing Li Chunfeng's runes about the circuit board that he even threw aside the matter of going to Datang to get Tian Huang, and immediately ran back to modern times; Without saying a word, he asked Ye Jinhui to contact Zeng Ziguo; Because Zeng Jianguo was the fastest person he could think of who could make circuit boards.

As soon as he heard Zeng Jianguo's voice sound, Ye Jinyu hurriedly said: "Fellow, hello, I want to trouble you with something today, please be sure to help." ”

Zeng Jianguo over there had already frowned, in such a hurry, it must be no good thing.

"Hello fellow, if there is anything you need my help with, you say come and listen, I will do my best to help."

"I can help, I can help; It's very simple for you. Ye Jinyu was overjoyed, and said in his heart that at this critical time, the fellow was still powerful.

"That's right, fellow, I need to make a circuit board; I already have that circuit pattern, but I don't know how to make a circuit board, so I can only find your top student to help. ”

Making circuit boards is indeed Zeng Jianguo's business, but he can help, so he asked: "What kind of circuit board do you want to make?" Is it single-sided, double-sided, or multi-layered? ”

"Huh? How much attention is paid to a circuit board? Ye Jinyu only thought that the circuit board was like a symbol, with some copper foil printed on a board; What he sees the most is the computer motherboard, as well as the various printing boards and motherboards in the photocopier; If you pick out the components above, it doesn't seem to be too complicated! If you don't understand, don't pretend to understand, and humbly ask professionals for advice.

"So what kind of board should I make?"

"It depends on your needs." Zeng Jianguo's voice came from the phone, and when he talked about his profession, he seemed very confident: "There are many kinds of circuit boards, such as ceramic circuit boards, alumina ceramic circuit boards, aluminum nitride ceramic circuit boards, circuit boards, PCB boards, aluminum substrates, high-frequency boards, thick copper plates, impedance boards, ultra-thin circuit boards, ultra-thin circuit boards, etc.; However, the most common circuit board is still printed circuit board, that is, the various PCB motherboards that can be seen in ordinary times. ”

Ye Jinyu wanted to say, you said it too fast, I didn't remember it all; But I was embarrassed to say it.

Zeng Jianguoyi is talking about himself: "If the number of layers is divided, it is divided into three major categories: single-panel, double-panel, and multi-layer circuit boards. Single-sided is the simplest, where all parts are concentrated on one side and the wires are concentrated on the other; It is simple to make and low in cost; However, the disadvantage is that you can't lay out too complicated lines. ”

Ye Jinyu felt that this single-layer board was just in line with his understanding of circuit boards.

"Double-sided is an extension of single-sided board, and a layer of wiring cannot meet the needs of electronic products, so both sides of the plate are covered with copper wiring."

Hearing the introduction of the double-panel, Ye Jinyu's eyes lit up, if a circuit board is put on the front with a hanging charm and a magic charm on the back, what kind of chemical effect will it produce? Or if you draw a dangling charm on both sides, will the dangling effect be doubled?

Ye Jinyu thought in his heart, and Zeng Jianguo said:

"Multi-layer boards are generally more than three layers of boards, which you can understand as several single-layer boards separated by insulating materials and pressed together. Like the computer motherboards we commonly use, they are generally multi-layer boards with six to eight layers; Higher-end motherboards will even use 12 layers. ”

Twelve floors? If a palm-sized motherboard has twelve layers of hanging charms on it, behave! If so, how much lift does it have to generate? It was so beautiful that Ye Jinyu was about to drool.

Putting aside all the good conjectures, the first priority is to verify whether the runes can be boarded.

"Fellow, now I just need to make a small circuit board, which won't be as big as a computer motherboard." Ye Jinyu gestured with his hand, a piece of rune paper, about the size of a mobile phone.

Just through the phone, Zeng Ziguo couldn't see his gesture, and asked again: "Small circuit board?" How small do you want to be? No matter how small it is, it can only be made into integrated circuits, or better yet, into large-scale integrated circuits and ultra-large-scale integrated circuits; That is, what we usually call chips, CPUs. ”

Make runes into CPU......

Ye Jinyu felt that this brain hole was a bit too big, and he had to take a few deep breaths.

Excited, he said directly:

"Fellow, it's not as troublesome as you think, I just need a small board, and the circuit is very simple. You can come and see it, rest assured, the money will not be less, I can pay you wages and labor fees. ”

But Zeng Ziguo on the other end of the phone immediately changed his face as soon as he heard about the money.

"Alas! Fellow, I've been with the project recently, and I can't leave at all! ”