Compared with plastic lenses, silicon wafers are more than one level more difficult to manufacture.

Not only is the equipment itself complex and huge, but also the material requirements for the equipment itself are higher.

For example, the furnace body and furnace tube of the single crystal furnace use a high-purity SiO2 that can withstand chemical reactions and thermal stresses at high temperatures.

The bottom and lid of the furnace that come into contact with the silicon material are made of ceramic materials, which are made of high-purity high-temperature resistant materials such as Al2O3 and Si3N4, which have strong heat conductivity and corrosion resistance.

The most critical part is the heating rod.

Kangchi's method for purifying monocrystalline silicon is not the mainstream Chai Kelaski method, but the floating belt method, also known as the regional smelting method.

The principle of this method is to put an annular heater on the polycrystalline silicon rod, and the polycrystalline silicon rod is smelted and purified in stages, and finally 11 monocrystalline silicon rods of 9 purity are obtained.

Its advantage is the speed of manufacture, faster than the chaikolaski method,

It takes about 8 hours to pull out a 12-inch 1.5-meter-long silicon rod using the chaikraski method, while it only takes 1 hour or less with the floating belt method.

In addition, the floating band method can also change the shape of the monocrystalline silicon rod through technical means.

For example, silicon wafers are usually round, and silicon wafers become wafers after photolithography and etching, and finally cut the wafer into dozens of square chips like cutting a cake, and after packaging, it becomes the CPU in the hands of users.

And the process of going from circle to square naturally inevitably leads to the waste of edges.

If the floating belt method is adopted, as long as the shape of the heating rod is changed, it is theoretically possible to manufacture a silicon rod larger than 12 inches, reducing the waste of subsequent wafer cutting.

It is even possible to continue technological breakthroughs and pull out square silicon rods to achieve zero wafer waste.

However, the floating belt method has very high requirements for smelting and purification technology, and the yield of monocrystalline silicon rods obtained by this method is very low, which is a method that needs to be improved.

The Kangchi scheme is actually an improved version of the floating belt method.

It is done by adding a cooling rod under the heating rod.

This not only further improves the melting speed and quality, but also quickly stabilizes the shape of the silicon inpart.

However, its technical difficulty has undoubtedly increased by another order of magnitude, and the control ability of heating rods and cooling rods is extremely demanding, and the complexity of its equipment is not an order of magnitude with ordinary single crystal furnaces.

Because of this, it is no longer possible for Kangchi to complete this project by itself like the lens production line.

The material of the single crystal furnace alone is not something that ordinary people can rub.

This requires professional technicians and professional equipment to make the parts on his drawings.

Therefore, the first thing Kangchi did when he returned to Dongyang City was to set up the personnel department of Dahan Silicon Industry, so that they could recruit a large number of outstanding engineers and scientific research and technical personnel for the whole country.

The second thing is the initial project bidding of Dahan Wafer R&D and Manufacturing Center.

This thing is not difficult, as long as the news is released, a large number of construction companies respond,

What Kangchi has to do is to screen out reliable construction companies, and then let them quote.

In this regard, he temporarily handed over the work to Fang Qiming to do.

Fang Qiming was already very busy taking care of Daqin Optics, and he didn't know much about the project bidding, but Kangchi still had to draw design drawings during this time, and he couldn't be busy, so Fang Qiming had no choice but to bite the bullet.

The main thing is that there is too much shortage of people.

With the establishment of Dahan Silicon's personnel department, this situation was quickly alleviated.

In addition to recruitment, there are some things that HR can do.

-----------------

Dongyang City Investment Promotion Bureau.

After Director Guo came to the office, he habitually looked at the latest China Merchants Daily.

This is a habit he has developed since coming to China Merchants, which is helpful to understand the situation of China Merchants Bureaus in various places, and he may be able to find inspiration on it when he is promoting his work.

As he turned to the third page of the newspaper, a headline suddenly caught his attention.

"Dahan Silicon?"

The name was all too familiar to him.

Director Guo couldn't help but cheer up and read on.

The content of the article is not long, first a brief introduction to the content of the 100-day operation in the steel city, and then the latest progress of their reports:

Dahan Silicon and Gangcheng successfully signed a letter of intent for an investment of one billion!

Director Guo's brows suddenly jumped.

This Dahan Silicon Industry ......

After hitting a wall in Dongyang, he hooked up with Steel City so quickly?!

He immediately realized that something was wrong!

The Han Silicon Industry never thought about hoarding land at all.

People are sincerely engaged in investing in silicon wafers!

Otherwise, how could they go to a poor rural area like Steel City, where there is little room for land appreciation?

At this time, Director Guo was in the same mood as having eaten the defense,

The duck that reached its beak actually flew,

And he spit it out by himself,

Who doesn't feel uncomfortable?

"No, they just signed a letter of intent!"

There is room for redemption!

Director Guo immediately took the newspaper, found Wang Ziliang in a hurry, and slapped the newspaper on the table: "Quick! Quickly contact Dahan Silicon Industry, just say that we agree to let them settle in the high-tech zone, and invite them to come over as soon as possible to talk in detail! ”

After Wang Ziliang heard this, he couldn't help frowning.

He glanced at the newspaper on the table and quickly understood what was happening.

However, he didn't panic, but took out another newspaper and said to Director Guo: "Don't worry, Guo Bureau, I also know about this, but do you want to read this newspaper first......

"Dongyang Evening News?"

Director Guo took the newspaper handed by Wang Ziliang and read it with some doubts.

Analysis of the Phenomenon of Illegal Land Hoarding by Enterprises - Talking about the recent strong rejection of many enterprises by Dongyang Investment Promotion Bureau to settle in the high-tech zone

The article first talked about the recent investment promotion incident that occurred in Dongyang Investment Promotion Bureau, and used sharp writing to satirize the outrageous applications of many enterprises, including Dahan Silicon Industry.

In this paragraph, the reporter also interviewed the relevant experts and professors involved in the industry of these companies, and pointed out how outrageous the applications of these companies are through their professional analysis.

In particular, the company that said that it would use 100 million to develop a recyclable rocket was scolded the most.

In the middle of the article, on this matter, the real purpose of these enterprises is analyzed.

During the period, a number of cases of illegal land hoarding by enterprises were cited, and the harm of land hoarding by enterprises was further interpreted.

At the end of the article, it is highly praised for Dongyang Investment Promotion Bureau,

It is believed that they are not overwhelmed by the pressure of attracting investment, but strictly abide by the bottom line, put an end to the hoarding of land by enterprises from the source for Dongyang City, give these enterprises with impure motives a blow to the head, and create a more fair and just business and investment environment for Dongyang City.

This article was written by Yuan Shulin, a reporter from Dongyang Evening News,

She is a senior reporter in Dongyang Evening News, and she became famous for writing negative news with sharp writing, and many leaders stayed away from her, for fear of being written into the news by her pen.

Although she wrote negatively this time,

However, the work of Dongyang Investment Promotion Bureau was highly praised, which made Director Guo feel a little lucky.

At the same time, he also realized the meaning of Wang Ziliang's words just now.

As soon as they praised you, you agreed to settle in......

Will it fall into the mouth?

What will the leader think of you?

Director Guo suddenly fell into a dilemma again.