The era of full-scale production of LED silicon substrates seems to be coming soon.
Recently, Guoxing Optoelectronics invested in the US RaySent Technology Company and obtained the approval of the Guangdong Provincial Department of Commerce and issued the “Enterprise Overseas Investment Certificateâ€. The approval and filing documents for other overseas investments are being processed.
On December 13, 2016, Guoxing signed a capital increase agreement with RaySent Technologies of the United States. The company increased its investment in RaySent Technology with its own funds of US$11 million. Upon completion of the investment, RaySent Technology became a holding subsidiary of the company.
It is understood that RaySent Technology has high-power LED chips and related proprietary technologies on silicon substrates. Its intellectual property and proprietary technologies cover all aspects of LED production processes such as epitaxial growth, chip manufacturing and packaging.
Through this cooperation, RaySent Technology will license the unique silicon substrate GaN epitaxial technology and the vertical structure LED and its derivative structure to Guoxing Optoelectronics and its subsidiaries, and realize industrial production through Guoxing Optoelectronics and its subsidiaries. .
Guoxing Optoelectronics said that the company is committed to becoming a fully-developed LED enterprise. This cooperation is an important step for the company to accelerate the internationalization process and promote the implementation of the globalization strategy. It is also an important deployment of the implementation of the innovation strategy, which will help the company to upgrade its upstream technology strength. Promote the company's upstream and downstream industry chain balance to become bigger and stronger, and form a competitive advantage.
Liu Zhihua, director of the market for crystal energy optoelectronics, also said, "National Star Optoelectronics can invest in RaySent technology to achieve mass production of silicon substrate high-power chips, which is also a good thing for us. Because there are constantly companies joining the silicon substrate." "The team" can also play a role in promoting the development of silicon substrate LED technology and industry."
When it comes to silicon substrate LED technology, China is actually the earliest practitioner.
In August 2014, the US Department of Energy's "Manufacturing Roadmap: Solid-State Lighting Research and Development" report clearly stated: "Crystal Optoelectronics is the earliest practitioner of silicon substrate LED technology. And in June 2012, mass production of silicon nitride gallium nitride LED bare core began.
Undoubtedly, this is the international recognition of Crystal Energy's leading LED technology in silicon. In fact, the preparation of high-efficiency GaN-based LEDs on silicon substrates has been the goal of academia.
However, due to the large lattice mismatch and thermal mismatch between silicon and GaN, the epitaxial film crack, the poor crystal quality, and the low light-emitting efficiency caused by the opacity of the substrate have not been solved for a long time, which has led the industry to believe that it is on silicon. It is impossible to prepare high-efficiency GaN-based LEDs, and the GaN-based LED route on silicon substrates is almost "death".
In the investigation process, Gaogong LED found that some people in the industry believe that “although the price of silicon substrate is relatively cheaper, the production process is more complicated, and there is no advantage in comparison. In the future, there is no market in the traditional lighting field.â€
There are also people in the industry who question that automotive lighting, plant lighting, stage lighting and other lighting are directional. Silicon substrates have advantages in these applications, but silicon carbide used by Cree has better matching and higher brightness. It depends on whether the silicon substrate can meet these performance requirements.
Liu Zhihua explained to the questioning, "After more than 3,000 trials, the technology R&D team in 2005 took the lead in overcoming this technical problem in the international arena. Then Jingneng Optoelectronics invested more than 80 million yuan each year to continuously break through the key difficulties of technology and technology. At present, the indicators of silicon substrate LED products produced by Jingneng Optoelectronics are in the international leading level in the same research, and have been in line with the sapphire and silicon carbide technology routes."
Up to now, Jingneng Optoelectronics has applied for more than 330 international and domestic patents around the silicon substrate LED technology, and has granted 147 patents, including 47 international patents.
Of course, the success of the industrialization of silicon substrate LED technology in China has attracted the layout of many international companies. Although Osram, Samsung, Toshiba and other international companies are also investing heavily in the development of silicon-based LED technology, the reporters found that these companies have not really entered commercialization.
As is known to all, domestic LED companies are mainly concentrated in the low-end market for price fights, resulting in a serious excess capacity. The high-end market basically relies on imports, especially the high-power LED chips needed in the high-end lighting market, and there is basically no production in China.
"The silicon substrate LED chip has the characteristics of good heat dissipation, high reliability, good light directivity and good light quality. It is used in high-end lighting such as automotive lighting, mobile phone flash, UV LED, outdoor lighting, high-end indoor lighting, special lighting, and plant lighting. The field has advantages, filling the gap of high-end light source products for China's LED industry." Liu Zhihua told Gaogong LED.
In order to fully utilize its own silicon substrate technology, Crystal Energy has introduced a 365-430nm high-efficiency silicon substrate UVA LED product in 2015. Up to now, silicon substrate UVA LED products have been in the forefront of the market in the field of industrial light curing, nail beauty, anti-counterfeiting and other fields.
Xie Mingxun, deputy general manager of Jingyuan Optoelectronics, also said, “At present, UV-LED products on silicon substrates are in the forefront of the industrial curing field. This potential has great potential in the future, and requires high stability and wavelength accuracy. The price is relatively stable."
It is worth mentioning that the development of the silicon substrate LED industry is affecting the hearts of the two committee members. During the two sessions in 2015 and 2016, the committee members repeatedly voiced the silicon substrate LED, suggesting that the industrial development of the silicon substrate LED will rise. For the national strategy.
Nowadays, “accelerating the industrialization of silicon substrate LED technology†has been officially written into the “13th Five-Year Plan for Energy Conservation and Environmental Protection Industry Development†jointly issued by the National Development and Reform Commission and the Ministry of Science and Technology. It is undeniable that the silicon substrate LED industry Development welcomes new opportunities.
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