Mu Yang couldn't sleep and began to study the production of single crystal silicon rods and wafer manufacturing.

He did not want the monocrystalline silicon rods to be restricted from being supplied by international giants since the beginning, and independent research and development and production can also ensure quality.

For example, if it needs 12-inch wafers, then first there must be 12-inch single crystal silicon rods. The manufacturer of raw material single crystal silicon rods will not sell them to Xinghai Group. They usually slice them into wafers and then process them to chip factories.

, or independently manufacture chips.

6-inch and 8-inch wafers are easy to buy, but 12-inch wafers are difficult and are in short supply no matter when.

If Xinghai Group needs larger wafers, other monocrystalline silicon rod manufacturers cannot produce them. After all, they have to independently develop and produce them.

Therefore, if you don’t want to be sanctioned in the future, you have to start with the raw materials single crystal silicon rods and wafers.

Muyang opened the Achievement Point Store and began searching for technology for monocrystalline silicon and wafers.

He had searched and learned about this before, but he didn't buy it.

After a while, according to his previous plan, among dozens of single-crystal silicon and crystal technologies, a technology that is more suitable for Xinghai Group and contemporary background was selected.

★A low-energy consumption and high-efficiency 12-inch single crystal silicon rod and wafer production method★

【Technical introduction: The new CZ single crystal growth method is adopted, and the production equipment of lower energy consumption of arc furnaces, quartz crucibles, graphite heaters, single crystal furnaces, argon production systems, heat fields, slicers and other production equipment are used to purify from raw materials

, polycrystalline silicon melting, rotary stretching out single crystal silicon, single crystal silicon rod and other process flows to ensure fewer impurities in polycrystalline silicon, higher purity of argon, and new processes to ensure fewer doping impurities in the production process of single crystal silicon rods.

Lower energy consumption and faster growth efficiency of single crystal silicon rods. Using better wire cutting machines, gold steel wires and grinding equipment can reduce fragmentation rate, cutting losses, as well as losses such as chips and scratches, single unit length

Crystalline silicon rods get more wafers.

It has the following advantages: low energy consumption, ultra-high purity single crystal silicon rod, lower argon gas usage cost, faster growth efficiency of single crystal silicon rod, better silicon toughness and not easy to break, excellent wafer raw material processing method】

[CZ-G12-01: World-class level, the same technology as the current world giant companies, demand achievement points: 100]

[CZ-G12-02: The world's top level, leading the current laboratory's most advanced technology for about 4-8 years, demand achievement point: 250]

Mu Yang compared the two versions of the technology and found that the equipment of the CZ-G12-02 version of the technology can also be manufactured, which means that the investment cost is higher, and most importantly, the consumption achievement points are more.

Versions 01 and 02 belong to the same type of technology. If you buy version 01, you only need to spend another 150 points to obtain version 02 technology.

However, after the technology is upgraded, the original equipment may not be suitable, and it is better to be in place at once.

Moreover, this technology is not only a technology for single crystal silicon generation, but also includes the technology of cutting single crystal silicon rods into wafers and processing them into final wafers. Of course, it does not include chip manufacturing and chip design.

In the end, Muyang bought the CZ-G12-02 version technology.

When purchasing this technology, it mainly requires that semiconductor technology skills reach level 7. Mu Yang has already upgraded semiconductor technology to level 7, and other skills can also be met and can be purchased directly.

A few minutes later.

Muyang has absorbed this technology and has gained more knowledge about wafer production.

For example, the most critical single crystal furnace equipment, Muyang calls it the XH1200 single crystal furnace. This equipment can use a 40-45-inch thermal system, with a maximum melt volume of 1200kg, and can draw 12-inch to 14-inch single crystal.

Silicone rod.

If a 14-inch single crystal silicon rod is produced, the wafer purity is lower, and the optimal size is 12-inch.

But owning this equipment already indicates that Xinghai Group has the level of mass production of 14-inch wafers.

The maximum melt volume is 1200kg, which is not much higher than the mainstream 12-inch single crystal furnace melt volume of 1000kg. This is not important. If you want to make the equipment bigger, you can make it bigger, but later processing will be very troublesome.

The energy consumption will be greater, and there is no need.

How long is a 1000kg 12-inch single crystal silicon rod?

The density of single crystal silicon is 2.32-2.34 grams per cubic centimeter. If it is 12 inches, it means the diameter is 302!

The weight of single crystal silicon per centimeter of thickness is 1646 grams, that is, 1.646KG!

One meter long is 164.46KG. If losses are not taken into account, a ton of melt can produce single crystal silicon rods with a length of up to 6 meters.

But in fact, it is generally very impressive to be made into four or five meters long.

The advantage of long is that it uses higher utilization rates, because the ends of the single-crystal silicon rod are not flat, but are conical, and there is material waste.

Of course, this loss is nothing compared to the entire single crystal silicon rod.

In addition to the diameter and size of single crystal silicon, there is also a core indicator, namely the purity of single crystal silicon!

General wafer purity requirements: above 99.999%.

In fact, the manufacturing process of wafers is not very complicated. The difficulty lies in the fact that semiconductor products have very high requirements for wafer purity, and the actual purity needs to reach 99.99999999999% (9 9) or more.

Someone may ask, why do you need to achieve such an outrageous purity?

Is 99.999% not OK?

Purity = mass/total mass × 100%

If the purity is 99.999999%, that is, a ton of single crystal silicon contains 1 gram of impurities, or about a 12-inch single crystal silicon rod that is several meters long contains 1 gram of impurities.

1 gram of impurities is not concentrated in one area, it is mostly scattered.

If you just concentrate on one chip, you don’t have to worry at all, just scrap the chip directly.

The problem is, you don't know how these impurities are distributed.

If there are impurities on the circuit on this chip and it suddenly collapses on a highway, it will affect the entire highway operation, and it will even be unable to operate and will be directly scrapped.

Therefore, this is why the wafer requires high purity. If the purity is only 99.5%, maybe the entire single crystal silicon rod cannot be used, and the core scrap rate will be very high.

Moreover, the electrical properties of semiconductor materials are very sensitive to the concentration of impurities, so further purification is needed.

After Mu Yang absorbed the information, he felt a little tired and went back to the house to rest.

The next day, Mu Yang started to go to the 103rd floor to output the CZ-G12-02 information.

After more than ten days of busyness, Mu Yang finished outputting the equipment manufacturing data. Materials such as manufacturing processes can only take their time.

The CZ-G12-02 equipment is not very complicated, the core is a single crystal furnace, which Muyang divides into 9 small project equipment.

Wafer production is a new field in Xinghai Group. Muyang has given the Nebula team half a year to let them figure out the world's top wafer manufacturing technology. It is impossible.

If so, 12-inch wafer equipment would have been mass-produced in China long ago.

Of course, the equipment may be easy to do, but the manufacturing process is more important. If you don’t understand the technology, it’s useless to create the equipment.

Moreover, the CZ-G12-02 equipment is completely different from the equipment of other manufacturers, and the automation procedures are higher.

Mu Yang plans to carry out the technical output of this project, which is impossible.

On March 20, Muyang held a scientific research meeting of Xingyun Technology Company.

Nebula Technology Company has been established since last year. Currently, the company has about 200 employees, most of which are scientific researchers and are still expanding.

In the past six months, the staff of this company have been working together with the team and experiments, and Mu Yang has asked them to make mistakes and learn.

The technical manager is Xianghai, a returnee doctor, and a senior semiconductor expert. He is 40 years old this year. Mu Yang was promoted from the leaders of each group leader of the Nebula Company and has not yet fully transferred to a full-time official.

As the group's technical manager, Xiang Hai is actually equivalent to the technical vice president of the subsidiary, but it is only established in Xinghai Group in this way, treating wafer production as a major project.

When each project team develops to a certain scale, Muyang will separate these major projects and establish general managers and technical vice presidents of subsidiaries, which is also a path that Xinghai Group must take.

In addition to Mu Yang and Secretary Luo Zhize, the participants included Xiang Hai, 3 technical deputy managers and 6 technical experts.

Mu Yang asked Luo Zhize to send the information, knocked down the table, and went straight to the topic: "Based on the situation of each group and your professional expertise, I will use arc furnace, quartz crucible, graphite heater, single crystal furnace, and argon production system.

, heat field, slicer and other production equipment are divided into nine equipment R&D teams. You must understand the equipment technology thoroughly and assist the patent department in applying for patents.

The specific drawings have been uploaded to the company's drawing system. You can view them according to your own permissions and pay attention to the technical confidentiality.

We cannot buy the above equipment from the market, so we can only independently develop and manufacture it. If there is anything we can't figure it out, we will ask the group expert group for help, and they will do their best to assist you.

Most of you have newly joined Xinghai Group. Xingyun Technology and other project teams are a whole. Don’t treat Xingyun Technology as a Mavericks company. You must take the initiative to communicate and coordinate. There is no intrigue in Xinghai Group. Don’t be hugged when you do things.

With your own little thoughts.

For example, when producing slicers, after you finish the processing task, the machining workshop will naturally schedule production according to the process and everything will follow the process. If the process cannot move, go to the machining production manager to coordinate.

As long as it is not a concentrated task, the group's basic processing tasks will not be very busy so that it will be queuing for a week or two before it will be done. Generally, small parts processing tasks will be issued in the morning and processed in the afternoon.

Remember, you are a team.”

After listening to the chairman's words, Xiang Hai and others looked through the information.

Just like the data of a slicer, the above technical requirements are required, but there is no specific processing size of the detailed drawings. You can only open it on the computer to view the permission information you can see.

The newcomer is curious about where the chairman gets these information, but he doesn't dare to ask. In Xinghai Group, it is rumored that the chairman is an all-round expert with even more skilled operational skills and has won the World Skills Championship.

Drawing pictures is fast, and a senior mechanical engineer needs to draw for an hour, and it will definitely not exceed ten minutes when he reaches the chairman's hands.
Chapter completed!