Ultraviolet LEDs (UVLEDs) have established a market in the field of hardening, drying, and bonding, that is, UV curing, using ultraviolet rays for the past five years. UVLEDs have the advantages of large UV output power, small size and low power consumption, which bring great value to the market of UV systems and users of these systems. Due to its small size and low operating cost, UVLED-equipped devices have rapidly replaced the original technology of using mercury lamps, and the UVLED market in the UV curing business has been expanding. In 2008, the entire UVLED market was the largest, but it was $20 million. In 2014, it expanded to a maximum of $90 million, with an average annual growth rate (CAGR) of 28.5. The new era is about to kick off. French research company YoleDeveloppement (hereinafter referred to as Yole) said that disinfection and purification applications will become the key to the growth of the UVLED market in the next three years. With the expansion of UV curing technology using UVLEDs to the ink, adhesive and coating industries, the UVLED market is expected to expand further. In addition, new uses such as disinfection and purification have been added. UVLED performance is not sufficient for disinfection and purification applications. However, as performance improves in the future, it is estimated that some of the benefits of the UVLED market by 2018 will come from the use of UVC (UV-C band) for disinfection and purification. The size of the UVLED market is expected to expand from a maximum of $90 million in 2014 to a maximum of $500 million in 2019. However, this scale is premised on the standard application of UVLEDs instead of UV lamps. If UVLEDs are also being used in general lighting, plant cultivation lighting, biomedical devices, and nosocomial infections, the UVLED market is likely to achieve greater growth in the future. And from the perspective of the possibilities of UVLED, lighting and medical use only reflect a small part of it. Although the new application areas of UVLED have not yet had a big impact on market size, Yole expects that the share of these new applications will likely account for about 10% of the entire UVLED market by 2019. Large companies are involved in the UVLED market In 2008, only about 10 companies were developing and manufacturing UVLEDs. More than 50 companies have since entered the UVLED market (30 of them were involved between 2012 and 2014). Most of these companies are involved in the UVLED market with high profitability. At that time, the LED TV crisis caused the overcapacity and price decline in the visible light LED industry to become increasingly prominent, which caused the industry to be hit hard, which created an opportunity for the above-mentioned enterprises to enter the UVLED market. Most of the new companies involved are small and medium-sized LED companies. However, it is worth noting recently that many large companies (Philips Lumileds Lighting Company and South Korea's LG Innotek) have entered the UVLED business in the visible light LED industry. The involvement of these two large companies will have a huge impact on the UVLED industry, the market and even technological advancement. Both Philips Lumileds Lighting and LGInnotek have a high level of expertise developed through visible light LEDs. Philips Lumileds Lighting and LGInnotek have basically transitioned the LED production process to a 6-inch sapphire substrate. Production efficiency can be increased by at least 30 compared to the 2-inch process. This can further reduce manufacturing costs. In addition, with the knowledge related to pre-process and packaging, the two companies can also improve the performance of UVLEDs and reduce the price per unit of input power ($/W). High efficiency is the key to market growth. The external quantum efficiency of UVLED is a few percentage points of UVC to UVA (UV-A band) and near-ultraviolet 40-50, aiming at the development of high-efficiency chips or will become the UVLED market. The key to growth. In fact, the efficiency of UVLED will directly affect the popularity of UVLED. In the future, in the field of purification and disinfection applications that are expected to promote the growth of the UVLED market, the reason why UVLED is not yet popular is that the UVC recognized for this use does not have sufficient efficiency. In order to improve external quantum efficiency, LED manufacturers must improve various parameters related to efficiency and promote technology development. Specifically, it is to improve internal quantum efficiency, quantum injection efficiency, and light extraction efficiency. At this time, the efficiency improvement technology such as flip chip structure and optoelectronic structure, which has been cultivated by the visible light LED industry for more than 10 years, can be directly used for UVLED. However, UVLEDs have an inherent problem stemming from the In/AlGaN epitaxial layer, and it is necessary to advance research and development from the viewpoint of substrate and crystal growth to specifically solve this problem. In addition to low optical output power, UVLEDs present further problems at the package level due to inefficiencies. This is where most of the input power will become hot. Therefore, thermal management of UVLEDs is the key to improving reliability of equipment and related systems. In this regard, the expertise developed by the visible light LED industry can also play a role. For UVLED related technologies, Yole summarized the development blueprint in the latest report. By introducing these technologies, UVLED is expected to open up new uses. UVLED technology is now entering a very strong growth area.
Aluminum Deep Drawing Sheet is a kind of Aluminum Sheet suitable for deep drawing process.It has wide applications.The advantage of aluminum deep drawing sheet is as follows:
1. Easy to process.
The results show that the casting aluminum alloy with good casting property or deformation aluminum alloy with good processing plasticity can be obtained by adding certain Ba Au Du element.
2. Good conductivity and thermal conductivity.
The electrical and thermal conductivity of aluminum is second only to silver, copper and gold.
3. The density is small.
The density of aluminum and aluminum alloy is close to 2.7 g / about 1 / 3 of that of iron or copper.
4. High strength.
The strength of aluminum and aluminum alloy is high. The matrix strength can be strengthened by cold working to a certain extent, and some brands of aluminum alloy can also be strengthened by heat treatment.
5. Good corrosion resistance.
The surface of aluminum is easy to produce a dense and firm protective film of Al2O3, which can protect the substrate from corrosion.
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