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As silicon substrate technology matures, due to cost and electrical considerations, large manufacturers have begun to try to use non-sapphire substrate technology to create LEDs, including TSMC SSL, which has been mass-produced recently, and Bridgelux and Japan. Toshiba's combination. The LED industry believes that the short-term performance of the silicon substrate LED in the specification and brightness is still insufficient, and there is still a gap with the sapphire substrate. However, if the first silicon substrate product is introduced, it will benefit the yield improvement. The original market is expected to be in 2015. With mature technology, it is expected that the first batch of silicon substrate products will be available in another 1-2 years.
Recently, LEDforum invited US equipment manufacturer Veeco to explain the progress of Gan-on-Si (silicon substrate GaN). It is expected that 8å‹ equipment will be the new focus of the future market, while German equipment manufacturer Aixtron will talk about Gan-on. -Si, also introduced the use of MOCVD equipment to build power supply units with higher temperature processes. At present, manufacturers have purchased and cut into the power supply market, while Japanese equipment manufacturer Dayang Rizin has also launched Gan-on-Si MOCVD equipment products, and Emphasize the niche market.
In addition, LED manufacturer CREE also launched LEDs without sapphire substrate technology, based on SiC (silicon carbide) to create LEDs, demanding high performance, and South Korea's LED manufacturer Seoul Semiconductor is coming to Taiwan to present the latest nPora technology, which is One of the results of the cooperation between the father of the blue LED, Nakamura Shuji, uses Gan-on-Gan (GaN substrate) technology. This kind of Gan substrate has relatively few manufacturers, but it has been shipped in size and can be compared with the traditional sapphire substrate. More suitable for building LED chips.
Veeco pointed out that although the sapphire substrate currently only accounts for about 10% of the cost of LED components, under the fierce market price competition and the cost pressure of the industry, the silicon substrate technology will be advanced in advance, and the original market is expected to mature in 2015. From the current technological development process, it is expected that the first batch of silicon substrate products will be seen in another 1-2 years. At that time, the cost price of the silicon substrate will be 90% lower than that of the sapphire substrate, and it has an excellent price advantage, but it is estimated that this will The LED die factory must face technical conversion problems early.
In the face of this trend, LED Taiwanese factories are also preparing for silence. Jingdian pointed out that it has been cooperating with ITRI and other Taiwanese companies, but in the short term, the silicon substrate LEDs still have a gap between specifications and brightness and sapphire substrates, so it is expected that they will not mature until 1~2 years later. .