Specializing in R&D and manufacturing of semi-semiconductor materials cutting, grinding, polishing equipment and automation equipment

China's first solar single crystal silicon cutting equipment innovation documentary

Editor:TDG-NISSIN PRECISION MACHINERY CO.,Ltd. │ Release Time:2019-05-14 

The length is 240 kilometers, which is close to the linear distance from Shanghai to Nanjing; the diameter is 0.14 mm, which is much thicker than the hair. Such a steel wire, wrapped in the machine, can not be loose, can not be broken, but also through the driving of several bearings, two single crystal silicon with a diameter of 6 inches and 300 mm is cut into more than 1500 pieces. . Such technology, such equipment, in addition to Shanghai Rijin, no one in the country can give it to the right。

  The last bottleneck of localization

  At present, China's solar photovoltaic industry is a typical "two heads outside" - more than 90% of the raw materials rely on imports, more than 90% of the products are exported, and in the processing chain, single crystal silicon cutting technology has always been a bottleneck, the equipment is all dependent on imports. It can be said that we are buying other people's raw materials and using other people's key technologies,Producing other people's products。

  “No more than 5 companies in the world can produce solar monocrystalline silicon cutting equipment, importing more than 3 million yuan, and we have to pay the US dollar! "Lu Jianming, chairman of Shanghai Rijin Machine Tool Co., Ltd., has an obvious unwillingness。

  In recent years, the solar photovoltaic industry has flourished, and the price of silicon materials has soared. At present, the price of one ton of silicon material on the market has reached 2.4 million yuan, while the 6-inch silicon wafer with a thickness of only 0.22 mm has a price of 50 yuan to 60 yuan per piece. Even this is often "hard to find". It is precisely because of the demand of the market that domestic enterprises have swarmed to produce monocrystalline silicon wafers, resulting in high imports of solar monocrystalline silicon cutting equipment for several years。

  Each Taiwan has more than 3 million and imports nearly 200 each year. This is a very clear account. Lu Jianming does not count, but does not want to count. He calculated that if we can produce such equipment ourselves, how much cost will be saved; and single crystal silicon cutting is a bottleneck in the entire processing chain. Once it breaks through, it will realize the full localization of solar monocrystalline silicon processing equipment。

  In December 2006, solar monocrystalline silicon cutting technology and equipment were successfully developed in Shanghai Rijin Machine Tool Co., Ltd., and its various indicators have surpassed the traditional standards, ending the history of China's cutting silicon wafers relying entirely on imported machines for many years. Cutting processing costs have a significant effect。

  a sentence of inspiration

  Before the independent research and development of solar monocrystalline silicon cutting technology equipment, in the old industrial base in Shanghai, Rijin is only a private enterprise that is unknown. Lu Jianming, Lu Jianwei, one chairman, one general manager, one responsible for decision management, one leading product research and development; the brothers worked hard for 10 years to create a place for enterprise development.。

  Both Lu Jianming and Lu Jianwei once studied technology, management, and entrepreneurship in Japanese companies. Shanghai Rijin also used foreign technical forces to talk about the development of solar monocrystalline silicon cutting equipment.。

  Three years ago, Lu Jianwei participated in a technical exchange with Japanese experts. At the salon, he got a message that the Japanese company would spend hundreds of millions of yen to purchase solar monocrystalline silicon cutting equipment. "The Japanese are very cautious in doing things. They have to spend hundreds of millions of projects to carry out projects. They must have conducted thorough investigation and argumentation. This kind of equipment definitely has a market." Lu Jianwei immediately expressed interest in this project, but did not expect that he The idea got a nearly ridiculous response from Japanese experts: "Can you afford it?”

  “It is difficult to play! "Although Lu Jianwei still said that he had to face difficulties in engaging in monocrystalline silicon cutting equipment, this sentence has already aroused his fighting spirit. He has to sigh。

  A few photos of the equipment, a manual, and Lu Jianwei returned to Shanghai with the “data” he collected, and started a competition with the Japanese。

  Three years and five million in exchange for success

  Solar single crystal silicon cutting and 12-inch single crystal silicon polishing technology and equipment have been listed as the national "863" attack. Lu Jianwei described the situation at that time with "one poor and two whites". R&D expenditures have not been settled. They have also “run” the “department”. However, due to insufficient registration funds, they have not won the project. In order to grasp more information, they want to observe the monocrystalline silicon cutting equipment imported by domestic enterprises. The white eyes to the peers were rejected。

  “This is also true. There are no ready-made rules and regulations. The mind is as clean as a piece of white paper. The things that are made are not the same as those of ourselves. It is entirely our own. Lu Jianwei said: From software development to machine design, there is nothing to learn from. Shanghai Rijin was "forced" to the road of independent innovation。

  The money is raised by yourself, and the people find it themselves. Shanghai Rijin has put the 5 million "home" on this machine. Lu Jianwei and the "old man" are working together on R&D. "My R&D staff is a high-tech enterprise, some professors at the university, and some enjoyment. The government special allowance, although retired, but the ability has not been reduced, compared with young people, 'old man' has their advantage." He said。

  In January 2006, the first solar monocrystalline silicon cutting prototype independently researched and developed by China was launched in Shanghai. During the first cutting test, all the R&D personnel were kept by the prototype, and the string in the heart was as tight as the wire in the machine. However, due to imperfect design, the wire was broken and the cutting was unsuccessful. In the following weeks, Lu Jianwei and his "old man" looked for reasons, changed plans, solved problems and started all over again.。

  "Although we continue to face failures, we are not in a hurry. The more times we fail, the more problems we expose, the better we can improve the machine." After more than a dozen trials and tests, 2006 In June, the first solar monocrystalline silicon wafer cut by China's domestically produced machine was introduced. Three years, a dozen people's hard work, 5 million investment in success, they do not know who to report to, just chose to drink together to celebrate the next day。

  There will be no more imported equipment market in China.

  Half a year later, Shanghai Rijin's solar monocrystalline silicon cutting equipment has already made a name for itself in the industry. The customers who came to visit the prototype did not believe that such equipment had been taken by the Chinese, but as soon as they walked into the factory and saw the silicon samples, the thumbs up were not put down。

  “The same performance, 60% price, better service, monocrystalline silicon cutting equipment will no longer have their market in China. Lu Jianwei said this sentence to himself, but also to the Japanese experts who once laughed at him. "In the future, we must not only meet domestic demand, but we must also target the international market。”

  In addition to solar monocrystalline silicon cutting equipment, Shanghai Rijin has recently had an independent innovation “falling ground”. The 12-inch monocrystalline silicon wafer polishing equipment developed by them has been tested, and the global and local leveling accuracy of the polished silicon wafer has reached the international advanced level. This is a technical reserve for the processing and manufacturing of IC chips in China five years ahead of schedule. In addition, there are two research and development products in the “waiting for the word”, one is the multi-bar cutting machine, the other is the multi-head and tail wire cutting machine, and it is expected that the prototype will be produced in August 2007. The development of these two products Successfully perfected the single crystal silicon front cutting processing equipment chain。