Power semiconductor market booming diamond single crystal substrate into research direction

Namiki has been the world's top 5 sapphire crystal growth and substrate processing plant for many years. This time at the Shanghai Electronics Show and International Electronic Circuit Show (SEMICON China), Miki Precision Gem Co., Ltd. Harada Minister Yu Xing accepted an interview with the media and revealed the development strategy of Mujing Precision Gems from 2016 to 2020. Although the current sapphire market is confusing and the scale of future applications is still unclear, and wood precision gems have advantages in technology and cost, we will maintain capacity scale in 2016 and continue to accelerate the improvement of heat field and process, making single crystal furnace capacity Increased by 25%; at the same time, facing the eager demand for sapphire mobile phone screen applications in the market, the external sales of guided mold furnace and technology transfer; and continued to lead the development of diamond single crystal substrate, as the highest-end products of the new generation of power semiconductors .
Minister Harada pointed out that the sapphire LED substrate produced by Miki Precision Gems has been the highest specification product on the international market for many years. It is the preferred substrate supplier for international and domestic LED manufacturers, and the substrate size is higher due to market demand. At the time of the big, the product quality and cost advantages of the guided mode method are more obvious; from 2015 to now, the Miki precision gemstones continue to have a good substrate sales performance.
The sapphire has not been widely used in the bottleneck of mobile phone protection screens. In addition to the sapphire crystal capacity and cost failed to meet market demand, the domestic sapphire crystal growth technology (KY) and heat exchange method (HEM) Most of the large-size screens produced cannot pass the strength test of Ring-on-Ring (ROR) and 4-Point Bending (4PB); Minister Harada said that the product strength test of the guided mold method is the largest in ROR or 4PB. The anti-destructive pressure value exceeds the bubble generation method and the heat exchange method product, and the proof-guide method product can better meet the strength requirement of sapphire in the application of the mobile phone screen; and the automatic production technology of the guide mode method can reduce the difficulty of the crystal growth and ensure the difficulty. The consistency of product quality can quickly achieve large-scale mass production and low-cost targets. Therefore, the advantage of guided-mode method in the application of mobile screen film is also very obvious.
Minister Harada believes that sapphire products will be widely used in mobile phone protection screens in 2016 , so he also began to sell the guide mold method crystal furnace, and cooperated with agent Shanghai Juhong International Trade Co., Ltd. to support equipment sales and technology transfer. , cooperate with customers to quickly introduce large-scale mass production, and prepare to overcome the huge sapphire mobile screen application market in advance.
At the same time, in the face of the vigorous development of the power semiconductor market, Minister Harada said that Wood has long been ahead of the international arena, and will turn his eyes and energy into a more future diamond single crystal substrate. Because diamond materials have more than three times the thermal conductivity and breakdown electric field compared to silicon carbide (SiC) and gallium nitride (GaN) materials, power semiconductor devices fabricated from diamond single crystal substrates are compared to Devices with SiC and GaN as substrates can withstand higher voltages, and because of the fast heat dissipation, the cooling system can be omitted, which is the ultimate for power semiconductor miniaturization and more energy-efficient applications.
At present, the production of diamond substrates with a size of 15mmx15mm has been completed and is in the market. However, due to the difficulty in manufacturing diamond substrates prepared by chemical vapor deposition (CVD), the cost is still high; And Mu will increase its technical capabilities and improve product quality year by year. It is expected that the scale production of 2 diamond substrates will be completed by 2020, and the cost will be greatly reduced. In the future, as the demand for power semiconductors and product specifications are gradually increasing, Power devices with diamond substrates as the core are expected to be widely used in high-end demand such as defense and wind power hydropower stations, and are expected to occupy a place in electric vehicles, railways and motor trains.

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