Ye Feng looked at the white sand on the ground and said, "Why is there no one mining the quartz sand here?"
Wang Meng asked: "What can be mined from sand? If you want me to pull two carts for you tomorrow."
Ye Feng explained: "Quartz sand is the main raw material for refining silicon."
Wang Meng wondered: "Which turtle? The one who makes oracle bones?"
Ye Feng said helplessly: "The one who makes chips."
Wang Meng suddenly realized: "Oh~, I knew it if you said that. When I was a child, I also went to Beijing and went to Silicon Valley to buy a computer."
Wang Meng then asked: "Can this thing make chips? How to make it? Just use this sand?"
Ye Feng thought for a moment and said, "Of course it's not that simple. The raw material for silicon-based chips is quartz sand. Of course, it cannot be made directly from the sand. It needs to be purified. Purifying the quartz sand to make polysilicon is only part of the first step of making a chip."
Wang Meng asked curiously: "I heard that the Angsa Kingdom also gathered the scientific research strength of dozens of countries in the Far West and overcame a series of technical problems before monopolizing the most advanced technology for manufacturing chips. How was this chip made?
Of? Why is it so difficult?”
Ye Feng pondered for a moment, as if opening a certain memory space, and then said slowly: "Chip manufacturing can be simply divided into four steps. The first step is to manufacture silicon wafers. The upstream of the semiconductor industry is silicon wafer manufacturing.
.Silicon wafers are divided into three steps, which are the preliminary purification of silicon, the manufacturing of polysilicon and the manufacturing of silicon wafers."
"The production of silicon wafers can be divided into two types: monocrystalline silicon wafers and polycrystalline silicon wafers. The initial purification purity of monocrystalline silicon is above 98%, but this is not enough. Silicon must be made into polycrystalline silicon. The production method is to metallurgically
Polycrystalline silicon is made from high-grade silicon. The polysilicon here can be divided into two types: high purity and low purity. High purity is ninety-nine percent followed by nine nine percent, and low purity is ninety-nine percent followed by seven nine percent.
High purity is used to make precision circuit ICs such as ICs, commonly known as semiconductor grade polysilicon; low purity is used to make solar cells, commonly known as solar grade polysilicon.”
"The second step is IC design. The IC design steps can be divided into specification formulation, logic design, circuit layout, post-layout simulation and mask production."
"The third step is ic manufacturing. The steps of ic manufacturing are thin film, photoresist, development, etching, photoresist removal, and then continue to cycle dozens of times. The thin film process is to plate metal or silicon oxide. The photoresist process is to
The circle is coated with a layer of photoresist, which is the photosensitive layer. The development process is to use strong light through the photomask and then shine on the wafer. The etching process is to etch away the film not covered by the photoresist. The photoresist removal process is to remove the above
After the photoresist is removed, the remaining part of the film is the circuit diagram.”
"To put it simply, it is to transfer the circuit pattern on the mask to the wafer. The process is very similar to the manufacturing process of traditional photos. Of course, the actual process is not that simple. The mask alone requires dozens of layers, and each
The layers require different materials.”
"The fourth step is IC packaging and testing. Packaging and testing includes packaging and testing. The packaging process includes cutting, pasting, welding, and molding. Cutting is the first step, which is to cut the wafers sent by the IC manufacturing company into individual wafers.
A rectangular ic. Pasting is to stick the ic to the pcb board. Welding is to solder the small pins of the ic to the pcb so that it is compatible with the pcb. Molding is to mold the pins. The next step is testing.
.”
"The above is just a simple description of the chip manufacturing process. In fact, chip manufacturing is much more complicated. The front-end process alone requires three to four hundred processes. Epitaxial deposition, chemical vapor deposition, glue photolithography process, photolithography imaging, and plasma etching.
, there are technical barriers to many processes such as ion implantation and dry stripping.”
"It is difficult for any country with average technology here to master it. It is difficult for one country to fully master so many industrial technologies. Only our country with a population of one billion has a complete industrial system and can complete it independently. Other countries must unite
Only by doing so can we achieve it. And the alliance will have conflicts of interest, unless the sponsoring country can maintain a single power. This is why after our country catches up technologically, the Angsa countries are unable to unite with other countries to engage in this kind of scientific research again."
Wang Meng looked at Ye Feng in surprise and said, "Fuck, this gadget is so complicated to make."
Ye Feng was even more surprised and thought to himself: "Did he understand it? Did he really understand it?"
In fact, Wang Meng didn't understand it, he just thought it sounded complicated, and it should be very complicated.
Ye Feng and Wang Meng chatted along the way and did not feel that the journey was boring. A few hours later, they arrived at Wang Meng's family's pasture at almost dusk. Wang Meng's family's pasture is very large, with an area of about 10,000 hectares. It is an area of 10 kilometers in length and width.
land.
Wang Meng's tent, house and horse, cattle and sheep pens are in the center of this land. There happens to be a small lake or a small pond there. There is an underground river running through the bottom of the lake with sufficient water source. In order to prevent the water source from being polluted by livestock or animals
, a fence was built around the lake. Living tents, houses and large pens for horses, cattle and sheep were surrounding it. Wang Meng's family also raised several shepherd dogs and Tibetan mastiffs.
The car had just stopped, and six people came out of the houses and tents, an elderly couple in their sixties, a strong girl in her twenties, two women in their thirties, and a couple in their thirties.
Old little girl.
Wang Meng pointed at the strong girl in the car and introduced to Ye Feng: "That girl is my sister. She is the most beautiful beauty within ten miles."
Ye Feng collapsed and said: "Fang, Fang, isn't your family the only one within ten miles?"
Wang Meng continued: "How come you stutter after seeing my sister? I told you that after seeing my sister, you will never have feelings for other women."
Ye Feng collapsed in his heart and said: "I don't just have no feelings for other women now, I have no feelings for all women now, and I want to become a monk."
Ye Feng asked unwillingly: "This is not the same person as in the photo. Do you have other sisters?"
Wang Meng explained: "Of course she is alone. Don't you know that your mobile phone has a beauty function? She just turned on a little beauty function and she looks a little thinner."
Ye Feng questioned: "Is this still a little bit?"
Wang Meng replied confidently: "That's right."
Ye Feng felt that he had never felt such a strong desire to go home. Ye Feng secretly determined to find a chance to go home in two days.
After getting off the bus, Wang Meng's family exchanged pleasantries for a while. Wang Meng held his daughter in his arms. Wang Meng's mother's eyes were moist, she pulled Wang Meng over and touched her again, saying, "Look, she's so thin and disfigured. She's eating outside."
It’s not good. Ask your dad to cook more delicious food for you in the past few days so that you can replenish your health."
Ye Feng secretly said: "Sure enough, I think you have lost weight. Fatty Wang has become a ball. Are you saying you have lost weight?"
Wang Meng introduced Ye Feng to his family. Wang Meng's mother looked at Ye Feng and said, "This young man is really strong, not bad."
"Huh? Wang Meng is so fat that he loses his appearance, but I am so weak and strong? Auntie, I also need to eat some of your delicious tonic." Ye Feng thought so in his heart but said humbly: "Auntie, thank you very much.
Already."
Wang Meng's family enthusiastically pulled Ye Feng indoors. In the room, Wang Meng's family had already prepared roasted whole lamb, cheese, beef in various ways, roasted naan, raisins, cantaloupe, kumiss, fruit wine and some mixed with unknown wild vegetables.
Mushroom soup and other delicacies filled the table.
Ye Feng was so happy to eat a table of delicious food that he couldn't miss his childhood. When Wang Meng's parents said they wanted to keep Ye Feng to stay for a while, Ye Feng had already forgotten the idea of leaving just now and agreed repeatedly. After three drinks, Ye Feng felt a little dizzy and his legs felt a little numb.
I stood up and changed my position, but as soon as I stood up, I felt dizzy and fell asleep.
When Ye Feng woke up the next day, it was almost noon. Ye Feng felt a little headache. At this time, Wang Meng's sister Wang Yue heard a sound inside and walked in with sober soup.
Wang Yue saw that Ye Feng had sat up and said: "Brother Ye Feng, wake up. The alcohol in our grassland has a strong aftertaste. You are not used to it yet. You were drunk yesterday. Drink this bowl of hangover soup and you will feel better."
Ye Feng said thank you, drank the hangover soup and asked: "Where is Wang Meng?"
Wang Yue said: "My two brothers went to graze and will not come back until evening."
Before Wang Meng went to join the army, his two brothers herded the cattle. Later, when Wang Meng joined the army, it was left to Wang Yue and General Wang to herd the cattle. Now that Wang Meng is back, Wang Yue stays at home to help his sister-in-law.