Magus Tech Chapter 574: Spell chip manufacturing process

At the same time.

Li Cha 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, the qualified pure sand is finally obtained.

Transfer the pure sand to another cylindrical container, add a large amount of coke, put it into a special furnace and start heating.

During the heating process, the sand made a sound, and Li Cha knew that it was the component of the sand—silicon dioxide—reacting with the component of coke—carbon, which would eventually produce metallurgical-grade coarse particles with a thickness of about 98%. silicon.

After heating, Li Cha got enough crude silicon, and without hesitation, he quickly started the second step of processing. The specific operation is to chlorinate with hydrochloric acid, and then distill to produce high-purity polysilicon step by step. According to the standard, the produced high-purity polysilicon has a purity of 99.999999999%—a total of 11 nines—this is a rigid requirement. If it is not met, the products produced later may have certain defects.

After completing this step and passing the test, Li Cha didn't stop, and started to put the polysilicon into a special container, which melted into a high-temperature liquid under the effect of high temperature.

After successful melting, put a small grain of silicon crystal silicon seed in the liquid, and use this grain of silicon crystal silicon seed as an attachment to let the liquid form little by little at the bottom. When the silicon crystal silicon seed that is put in and tied with a thread is pulled out slowly, a round rod is formed under the silicon crystal silicon seed. This is a single crystal silicon ingot, also known as a "grown crystal". It can be seen that the grown crystal is a standard cylinder with the same radius as the silicon crystal that was originally placed.

At this point, the negative film of the chip has completed the production stage, and the next step is the processing stage.

Putting away the produced monocrystalline silicon ingot, Li Cha stepped out of the main laboratory quickly, went to the mechanical processing sector, and then entered the research room.

In the research room, Li Cha put the monocrystalline silicon ingot on the processing table, kept it in a vertical state, adjusted the mechanical arm to move down, and began to cut precisely.

"Swipe!"

As the robotic arm swung over, one layer of the monocrystalline silicon ingot was immediately sliced ​​off, and the sliced ​​part happened to be a thin disc with a diameter of more than ten centimeters.

Grind and polish the wafer carefully, and you will see that the surface of the wafer is extremely bright, like a mirror, and becomes 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, it is the most original state of the chip, which is the so-called negative film.

At this point, the film production is complete.

……

After the negative film is made, the photoresist and developer need to be solved.

Photoresist is a liquid applied on the negative film. After being irradiated by special light, it will produce special changes. Then it will be immersed in the developing solution and undergo a special reaction to obtain the pattern on the mask.

Generally speaking, there are two types of photoresists - positive photoresist, and negative photoresist.

Positive photoresist, the exposed part undergoes a photochemical reaction and dissolves in the developer solution, while the unexposed part is insoluble in the developer solution and remains on the substrate, and the final pattern formed on the substrate is the same as the pattern on the mask.

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, Li Cha decided to use positive photoresist, so that it would be easier to make a mask later.

In this way, Li Cha started the configuration of chemical reagents.

After that, they were busy for several days, constantly entering and exiting the three-story wooden building, and Masi, who was watching, kept reporting the observations to the wizard Wan'an.

……

A few days later.

In a two-story wooden building.

After listening to Masi's report again, Wan An frowned deeply and was very puzzled: "Before, he was looking for the blood of demonized creatures and the juice of plants, which he could barely understand, but today he is looking for the blood of demonized creatures and the juice of plants. What is the ore called 'Montauk Stone', and what do you want to do?"

Because Ma Si had been outside for a long time, his stomach was growling with hunger. He stood in the corner and stuffed dried fish, pumpkin pie and other things into his mouth, while shaking his head and responded: "I don't know teacher, huh? Heck, anyway, from the very beginning, I thought that guy was weird, he didn't know what he was going to do at all, heck, heck..."

Wan An couldn't help feeling bad, and was even more annoyed when he heard the sound of Ma Si eating. Keep an eye on it, and don't miss any of his actions."

"But..." Ma Si hesitated for a moment, "Teacher, can I go after eating, I haven't eaten something properly for several days."

"Huh?!" Wan An raised his eyebrows, and his expression became a little dangerous.

"Me!" Masi groaned, swallowed the food, didn't dare to talk nonsense, kicked dried fish, pumpkin pie and other things into his arms, and ran out the door in a bit of embarrassment.

After running out the door, Ma Si took a pumpkin pie and put it in his mouth. He bit it hard, looking a bit hideous, but after swallowing the pumpkin pie with a "gudong", he returned to normal. Looking at the wooden building behind him, he exhaled ~IndoMTL.com~ and walked towards the corner of the gathering place.

……

Inside the Garden of Eden.

Main lab.

The two liquids of photoresist and developer were mixed in the container. Li Cha 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 The masking needs to be solved. However, masking is a big job."

Well, great job.

The function of the mask is to block the light from the light source, allowing 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, all the magic lines in the "Gloves of Destruction" design must be drawn on the mask.

"Crackling!"

Li Cha moved his body, let out a series of bone groaning sounds, then walked out the door and walked towards the machining sector.

In the mechanical processing sector research room, Li Cha found the prepared metal sheet, put it on the processing table and cut it into 10 cm square specifications. Then adjust the mechanical arm, put on the microscope glasses, adjust the focus, and draw lines on the metal sheet.

It takes a long time to describe, and I will stop occasionally, and after thinking for a while, I will continue to describe.

"Shushasha..."

In the research room of the mechanical processing sector, only the sound of metal cutting echoed, and it was extremely quiet...

In this silence, Li Cha is constantly working and working meticulously...

One minute, two minutes, three minutes...

Ten minutes, twenty minutes, thirty minutes...

One hour, two hours, three hours...