With the continuous expansion of the scope of recruitment advertisements of Feiyue Technology Company and the release of the news of what treatment XX has obtained, many technical experts in Hong Kong who originally did not look down on the company's treatment have also been moved, and even professors in the university have also come to apply, and the company has taken the opportunity to recruit dozens of high-level technical talents in various fields in one fell swoop.

At the same time, some technical experts who were originally overseas in other countries but wanted to work in Hong Kong also called the recruitment team to discuss interviews, and the number of them increased day by day, so that two weeks later, Bentley and Hillis had to take on the role of interviewers from the headquarters.

As for whether the transfer of personnel will have an impact on the original project research progress, this is not taken into account for the time being, as long as it has experienced the pain of this period of time, driven by these high-tech talents, the company will definitely usher in a period of rapid development.

However, Yao Fei, who has been addicted to interviewers, has already stepped on the magical land of Silicon Valley at this time.

"Cole, ready to open in five minutes......"

In the new monocrystalline silicon laboratory of Feiyue Technology, Brady and Yao Fei stand side by side, and the laboratory has reached the stage of cooling and decompression preparation for the production of monocrystalline silicon, and the results of the first phase of the establishment of the monocrystalline silicon laboratory are about to be revealed.

"Potter, control the furnace pressure, Cole should get too close before opening the furnace, be careful of the residual hot gas that is sprayed outward when the main furnace is opened, and wait for the hot gas in the furnace to dissipate before taking out the silicon crystal rod, understand?"

Everything started again, and several of the previous assistants promised to stay in the original research center with a lot of money from the Japan Electric Company, and these people in the laboratory were basically newly recruited by Brady, and the first time they saw a monocrystalline silicon furnace, even if it was at the laboratory level, they would definitely be a little unable to suppress their curiosity, so he had to remind him.

"Understood, Professor......"

Listening to Professor Brady's words, Potter cautiously took a few steps to the side, but his gaze could not hide the curiosity in his heart.

"Open the furnace!"

Five minutes passed, Brady commanded the furnace to open very simply, and then Porter pressed the red furnace button, and the furnace door opened automatically, which only needs to install a controller, and it has nothing to do with intelligence.

With a crisp "pop", a fleeting white smoke erupted from the furnace in all directions, which is the water vapor produced by the interaction of high-pressure hot gas with water molecules in the air.

After waiting for another two or three minutes, Porter put on his heat-resistant gloves and took out a rod-like object with a shiny black surface from the barrel-shaped furnace chamber, which was a monocrystalline silicon rod.

However, monocrystalline silicon is silvery-gray in nature, and because the crystal orientation is the same, it is glassy, so it looks like black.

The newly produced monocrystalline silicon rods cannot be directly processed and need to be tested and measured by chemical corrosion and testing instruments.

The detection process also contains many details, including crystal orientation, conductive type, doping, few son lifetime, resistivity range, resistivity uniformity, oxygen content, carbon content, diameter, length, end face leveling, end face curvature, dislocation density and crack hard damage.

Except for the diameter and length, the others must wait until the test is qualified and meets the specified standards before the next step of slicing can be carried out.

It didn't take long to test so many items, because there was a special monocrystalline silicon rod inspection equipment to test it.

The test report was handed to Brady first, and after seeing the test data, his face was full of serious expressions and a slight smile, but after a while, he became serious again.

Yao Fei took the report, and after reading it, he understood that the original oxygen content was still greatly exceeded, and the current purity only reached 99.57%, which seemed to be a big gap from the available 99.9%, don't underestimate the 0.42% purity gap, the products produced by using these two purities are definitely a heaven and an earth.

If he continues to rely on the traditional old methods for continuous improvement, Yao Fei estimates that it will take a long time, even with his continuous participation, it is estimated that it will take a year or two to talk, and Yao Fei can't afford this time.

"Professor, you have been very successful, and if we want to make a silicon rod that meets the standards in a short period of time, I am afraid that we will have to start trying to use the magnetron straight-pull technique, for this technique, I personally recommend that you start the experiment with the transverse magnetic field......"

In a short period of time, Brady has re-established the laboratory and opened the furnace with improved purity, although this is a laboratory environment, but it is undeniable that this is a reflection of his ability.

"No problem, immediately modify the growth furnace to create a magnetic field ......"

Since Yao Fei has explained the force value of the magnetic field on the melt before, the size of the magnet has been prepared in advance, as long as the position is measured and then installed.

Of course, this can only be said to be installed correctly in theory, but in order to achieve the desired effect, it is necessary to continuously make micro-adjustments according to the subsequent melt stress conditions in the growth.

The installation speed of the magnet is very fast, that is, two electromagnets can be installed on both sides of the furnace wall, so that the strength of the current can be controlled to create different strengths of magnetic fields when the power is on.

After a period of thorough cooling of the growth furnace, the used scrapped quartz crucible is removed, and then replaced with a new crucible to close the furnace door.

After vacuuming, leak pick-up and furnace pressure control, a new round of filler can be continued.

The operation steps of the magnetron straight-pull growth technique and the straight-pull growth technique are the same, and after seeing their control of the growth furnace before, Yao Fei has nothing to worry about.

"Professor, on the question of the influence of the magnetic field on the melt motion, I think you can slowly compare various data in the actual growth of monocrystalline silicon in the future, and then choose the best position to create the best magnetic field.

Now I think we can speed up the process, and in order to be able to produce a standard grade of silicon single crystal for integrated circuit manufacturing as soon as possible, I think we should combine other different technologies to use together......"

Things do need to be done step by step, but with Yao Fei's BUG, it is not a big deal to apply another new technique.

"Mr. Yao, what do you mean, using the District Melting Technique? But now we don't even have technical drawings, let alone retrofits......"

He had heard Yao Fei say this technique many times, and he originally thought that it would take a while for them to manufacture 99.9% of the silicon crystal rods before they could use it, but he didn't expect Yao Fei to use it so eagerly!

They can collect data by opening the furnace again and again, and then compare and analyze, although it will take some more time and some money, but in this way, it can completely reduce the waste of many techniques, and in the eyes of experts like Brady, each technique is very precious and cannot be wasted.

"Drawings, this is very simple, I can draw it to you in a while, as for how to modify, this still has to rely on the professor to figure out a way, I will explain to you in detail the principle of the zone melting method, as well as the detailed functions of each of its parts, and some different operation steps will also be carefully explained to you......"

Yao Fei was noncommittal about Brady's statement, walked straight to the desk, picked up a pen and paper, and a ruler, and Yao Fei began to draw the drawings of the district melting growth furnace.

The first is the stabilizing base, which is equipped with a crucible rising and rotating mechanism, followed by the main melting chamber, and the upper and lower furnace walls are evacuated by vacuum pumps.

The outer wall layer is inward, followed by the insulation, heating elements, graphite crucible, and a diameter control sensor is installed on the other side of the furnace chamber, and an isolation valve is used at the neck to ensure that the gas in the furnace escapes when the monocrystalline silicon grows.

The epitaxial chimney-like part has a rope to guide the seed crystals, and an air inlet for the inert gas argon. The top is sealed with a rising swivel mechanism.

Finally, with a control system that integrates and controls the operation of each part, the drawing of the vertical suspension zone melting method is completed.

It is worth noting that there is a big difference between the heating method of the zone melting method and the Zhizopull method, and the Zhypull method uses resistance heating to directly heat the solid polysilicon into a molten state for growth.

The zone melting method uses electronic bombardment, high-frequency induction or optical focusing to melt a polysilicon area, so that the liquid is supported by surface tension without falling, and then the melting area is moved by moving the polysilicon or heater.

This method does not use quartz crucibles, which can avoid crucible contamination, and can grow high resistivity silicon single crystals due to impurity coagulation and evaporation effects! ”

Greedy to chew more, as for the more advanced sub-chamber melting technique, let's wait for the results of the next stage of the test to come out, Yao Fei thought in his heart, if Brady knew what Yao Fei was thinking at this moment, he would probably have to scold, how many new techniques do you have in your mind, can't you just finish it in one breath, causing him to be like a stingy housekeeper until now, all he is thinking about is how to tap the potential of each technique to the extreme......

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