Li Guocheng applied the photoresist to the oxidized wafer, fixed the center of the wafer with a local vacuum suction cup, lifted it into the palm of his hand and gently rotated it, and used centrifugal force to evenly distribute the photoresist all over the plane.

After completing this step, Li Guocheng secretly decided that after the experiment was completed, he must build a glue throwing machine. I also rotate the glue by hand, which is too LOW.

But in the eyes of outsiders, Li Guocheng's every movement is very confident, proficient, and has a hidden rhythm. This may be the benefit of long-term modification, inadvertently installed a big X.

Because the applied photoresist is too thin, it will dry after sitting for more than ten minutes.

Taking advantage of this gap, Li Guocheng walked to the side of the lithography machine, put a wafer of the same specification on the base tray, adjusted the focus to the best state again, and then turned the violet part to move the handle to simulate ultraviolet lithography to print a wafer grid to determine the best walking distance and the most economical lithography distance.

After completing the simulation for an unknown number of times, the various parameters were written down in my heart.

When you come to the wafer just now, you can release your mind and check that the photoresist has dried. Hold the wafer with both hands with rubber gloves, place it in a tray, and secure it all around.

The ultraviolet light is activated, the pattern on the mask is clearly engraved in the specified square, and after waiting for 9 minutes, the chemical reaction of the photoresist irradiated by the violet light is completed and solidified in the telekinesis. This ensures that the portion of the wafer covered by the photoresist is retained during etching.

Turn off the violet light, take out the wafer, and observe with a magnifying glass. In fact, this step is for outsiders to see, just for the sake of it. In fact, under the exploration of telekinesis, it has been determined that both the lithography machine and the photoresist have met the design expectations.

Re-fix the wafer and mark it square-by-square in order from top to bottom and right to left. The marking of 32 radio-specific chips was completed in a very small way.

Remove the wafer, come to the etching machine, first immerse yourself in the first liquid tank, this time according to the data at the time of verification, wait 30 minutes, then extend it for 2 minutes, and take it out.

In fact, the whole process is in Li Guocheng's mental power monitoring, and the extension of 2 minutes is adjusted by him according to the current situation.

Zhou Xiaojuan, who was recording behind the big glass, frowned and did not speak, but only highlighted the time.

Put in the second liquid, this time with no adjustment, exactly 12 minutes.

However, during the cleaning process, it takes 5 minutes longer than the previous process.

The next step is drying, which is just a very simple heating wire. It was done in no time.

What followed was tedious manual work, but this was the least challenging for the mindful Li Guocheng, who placed the raw materials that needed to be doped in various positions in less than 20 minutes.

In order not to shock the world, Li Guocheng deliberately gestured for another 30 minutes. As for who will be in charge of this process in the future, Li Guocheng can only pray for him.

There is no automatic machine, and this work needs to be operated under a magnifying glass, and only after repeated confirmation will a little more be added until the requirements are met. Li Guocheng does not use a magnifying glass because he has already demonstrated his strong eyesight and control in the past two years.

After confirming that there is no problem, place the wafer in a vacuum diffusion furnace.

Soon after, Li Guocheng walked out with the wafer, and everyone wanted to gather around very much, but they had been warned in advance, so everyone got out of a big space.

Li Guocheng carefully inspected each etched square under an optical magnifying glass, and found that only two pieces were flawed, and the others fully met the design expectations.

Then he went to the cutting machine and finished cutting 32 chips very skillfully. After Li Guocheng readjusted the motor and manually made the wire saw rope, as long as the operation was done properly, the wafer was rarely damaged.

took out the two flawed chips and handed them to Director Li. Watching his hesitant movements, Li Guocheng hurriedly explained: "It's okay, these two pieces are defective, you can just get started."

Li Huaide took the chip, handed the other piece to Wu Liankui, and suddenly formed a two-person group a little away from Li Guocheng's workbench, and everyone was full of interest to understand the true face of the chip.

In the process of everyone playing, Li Guocheng sat in front of the packaging table, took the mold and base of DIP-16, and began the wiring and packaging work.

After everyone saw the core of the chip, they looked at Li Guocheng's packaging chip with a brush, although everyone could only see one side, but their interest was not reduced.

After the packaging of 30 chips was completed, Li Guocheng called everyone over to pass a defective product, and completed the packaging of the chip under the close observation of everyone, which finally satisfied everyone's curiosity.

The test is very simple, all the previous processes were under the monitoring of Li Guocheng's telekinesis, in fact, the test is a passing scene.

If this is the case, all 30 chips have passed the test.

Zhou Xiaojuan was curious, and tested the defective product, and all of them met the test indicators. Li Guocheng realized that his standards were set a little too high.

Everyone immediately became interested, and Qi Qi suggested that Li Guocheng complete the packaging of another piece. There is no way, he is also self-denying now, how can he refuse. But the results were not satisfactory, and the test did not pass.

Everyone analyzes together, who has a heavy hand, who touches it with his hand.

"Okay, let's be quiet", Li Huaide, stopped everyone's argument at the right time.

"Today is a milestone day, the first step and the most resolute step for the industrial chip manufacturing of our rolling mill. It is also the first chip in China that can be used to serve people's daily life. It marks that our chip technology has moved to the forefront of the world, and it is the best birthday gift for the motherland", Li Huaide spoke louder and louder, and his right hand waved more and more powerfully.

Before Li Huaide's words fell, thunderous cheers and applause came from the dust-free workshop.

"We are at the forefront of the world, no, soon we will be the first in the world", this is the frivolity of young people.

"Our laboratory is too powerful, Deputy Director Li is too powerful, they didn't expect us to do this", this is the newcomer who does not deserve to have a name. Such a sincere person, is it not considered to give him a name.

"In two years, Xiao Li's growth has been too fast", this is Wang Gong's sigh.

"Do you want to think about it again", this is the heart of Zhou Xiaojuan, who is blushing.

"This is my thigh that I always need to hold onto", Yan Jiefang's eyes were firm.

"Lao Li, your son is out of breath! I'm getting old, and now I'm messing with him", this is Zhang Tou's emotion.

。。。。。。。

After most of the people left, only Li Huaide, Li Guocheng and Wu Liankui were left in the dust-free workshop.

"The old rules, let's all move, Xiao Li will go to report to Old Man Zhao, Xiao Wu, you go to find your old man, and I will go to the old leader. This time, none of us can stop the rise of our rolling mill", Li Huaide was full of confidence.

Thank you all for your support!! Ask for recommendations! Ask for a commuter pass! Ask for a review!

In fact, chip manufacturing is very complex, with hundreds of processes, so in order not to let everyone play, try to compress it as much as possible, so that book friends who are not born in a major class can also have a basic understanding.

(End of chapter)