at the same time.
Richard took the sand and entered the Garden of Eden.
Walk into the main laboratory, pour the sand into a funnel-shaped container, and start cleaning, screening, and filtering. After many processes, you finally get qualified pure sand.
Transfer the pure sand to another cylindrical container, add a large amount of coke, put it in a special furnace and start heating.
During the heating process, the sand made a sound, and Richard knew that this was the component of the sand - silicon dioxide (SiO2), reacting with the component of the coke - carbon (C), which would eventually produce metallurgical grade silicon dioxide with a thickness of about 98%. Crude silicon (Si).
After heating, Richard got enough rough silicon. Without hesitation, he quickly started the second step of processing. The specific operation is to use hydrochloric acid for chlorination and then distillation to produce high-purity polysilicon step by step. According to the standards, the purity of the high-purity polysilicon produced is 99.999999999% - a total of 11 9s - which is a hard requirement. If it is not met, the products produced in the future are likely to have certain defects.
After completing this step and passing the test, Richard did not stop and began to put the polysilicon into a special container and melt it into a high-temperature liquid under the effect of high temperature.
After successful melting, put a small grain of silicon crystal silicon seed into the liquid, use this grain of silicon crystal silicon seed as an attachment, and let the liquid form little by little at the bottom. When the silicon crystal seed that was put in and tied with a thread was slowly pulled out, a round rod was formed under the silicon crystal seed. This is a single-crystal silicon rod, also known as a "long crystal". You can see that the long crystal is in the form of a standard cylinder, with the same radius as the silicon crystal seed that was originally placed.
At this point, the negative of the chip has completed the production stage, and the next step is the processing stage.
Putting away the single crystal silicon ingot, Richard quickly walked out of the main laboratory, went to the machining sector, and then entered the research room.
In the research room, Richard placed the single-crystal silicon ingot on the processing table, kept it vertical, adjusted the robotic arm to move downward, and began precise cutting.
"brush!"
The robotic arm waved over and saw that a layer of the single crystal silicon ingot was immediately shaved off. The shaved off part happened to be a thin disc with a diameter of more than ten centimeters.
After grinding and polishing the wafer carefully, you will see that the surface of the wafer is extremely bright, like a mirror, and it has become a qualified wafer - silicon wafer, which is the most basic raw material in the integrated circuit industry.
After the wafer is cut according to certain specifications, the chip will be in its most original state, which is the so-called negative.
At this point, the film production is completed.
…
After the film is produced, what needs to be solved is the photoresist and developer.
Photoresist is a liquid that is applied to the film. After being irradiated by special light, it will produce special changes. It is then immersed in the developer and undergoes a special reaction to obtain the pattern on the mask.
Generally speaking, there are two major categories of photoresists - positive photoresists and negative photoresists.
In positive photoresist, the exposed part undergoes a photochemical reaction and is dissolved in the developer. The unexposed part is insoluble in the developer and remains on the substrate. The final pattern formed on the substrate is the same as the pattern on the mask.
For negative photoresist, the exposed part is insoluble in the developer due to cross-linking and curing, while the unexposed part is soluble in the developer. The final pattern formed on the substrate is exactly the opposite of that on the mask.
After some consideration, Richard decided to use positive photoresist, which would make it easier to make a mask later.
In this way, Richard started the preparation of chemical reagents.
After that, they were busy for several days, constantly entering and exiting the three-story wooden building, while Mas, who was under surveillance, kept reporting what he observed to the wizard Wan'an.
…
A few days later.
In a two-story wooden building.
After listening to another report from Mas, Wan An frowned deeply and was very puzzled: "Before, he was looking for the blood of demonized creatures and the juice of plants, and he could barely understand it, but what is it called today?" What do you want to do with the Montauk Stone's ore?"
Because he had been outside for a long time, Mas's stomach growled with hunger. He stood in the corner and stuffed dried fish, pumpkin cakes and other things into his mouth, while shaking his head and responding: "I don't know, teacher, hey, hey, hey, anyway." From the beginning, I thought that guy was weird and had no idea what he was going to do, blah blah blah... "
Wan An couldn't help but feel bad. Hearing the sound of Mas slurping while eating, Wan An became even more bored. He suddenly turned his head to look at Mas and ordered: "Don't stay here anymore. Go out and keep watching." , we must not let go of any of his actions.”
"But..." Mas hesitated, "Teacher, can I go after eating? I haven't eaten properly in several days."
"Huh?!" Wan An raised his eyebrows and his expression became a little dangerous.
"Me!" Mas grunted, swallowed the food, didn't dare to talk nonsense, kicked the dried fish, pumpkin cake and other things into his arms, and ran out the door in a rather embarrassed manner, rolling and crawling.
After running out the door, Mas took a pumpkin pie and put it in his mouth, biting it hard, looking a little ferocious, but after swallowing the pumpkin pie with a "dong" sound, he returned to normal. He looked at the wooden building behind him, took a breath, and walked towards the corner of the gathering place.
…
In the Garden of Eden.
Main laboratory.
The two liquids, photoresist and developer, were mixed in the container. Richard carefully observed the reaction and nodded with satisfaction: "It seems that both liquids can play corresponding roles. Then, in addition to the light source, the remaining The boards need to be sorted out. But masking is a big job.”
Well, big job.
The function of the mask is to block the light from the light source and allow specific light to shine on the negative film coated with photoresist to produce a specific shape.
The shape on the mask is the shape on the chip.
Therefore, it is necessary to depict all the magic patterns in the design of "The Gloves of Destruction" on the mask.
"Crack!"
Richard moved his body and made a series of bone noises, then walked out of the door and walked towards the machining sector.
In the mechanical processing sector research room, Richard found the prepared metal sheet and placed it on the processing table to cut it into 10 cm square specifications. Then adjust the robotic arm, put on the microscope glasses, adjust the focus, and draw lines on the metal sheet.
I carve for a long time, occasionally stopping, thinking for a while, and then continue to carve.
"Shashasha..."
In the research room of the machining sector, only the sound of metal cutting echoed, and it was extremely quiet...
In this silence, Richard kept working and working meticulously...
One minute, two minutes, three minutes...
Ten minutes, twenty minutes, thirty minutes...
One hour, two hours, three hours...