At one end of the spectrum, there are also less wavelength than visible UV light (UV light), and a shorter wavelength of x-rays, emission rays. UV light part of the long wave can be divided into UVA repeatedly (315 ~ 400 nm), UVB (280 ~ 315 nm), UVC (200 nm to 280 nm), different wavelengths of UV light, energy intensity is different, the scope of application is different also, markets cover disinfection sterilization, anti-counterfeiting, curing, exposure, chemical detection, display, etc., gross output value of more than $one hundred million plus one and also, actually not small, blame only blame lighting backlit casually billions of dollars, just need to link the sea is a typical "the people's livelihood" and the momentum of "consumer electronics", the natural and elegant demeanour taken away the whole market.

Comparing with the maturity of visible LED, IR LED material system and manufacturing process, the manufacturing difficulty of UV LED is higher, the efficiency and life of UV LED is worse. "high technical threshold" combined with "small market suction" is the natural barrier to enter the UV LED market. This truly niche market may be part of the strategic planning and technical training for large companies, and it is a beautiful oasis for small companies to bypass the main battle and exploit new sources of power.

UV leds on the market at present is given priority to with UVA, wavelength of 365 nm, 375 nm, 385 nm nm, 395 nm, 405 nm, total UV LED output value is about ninety percent, because of blue light was GaN system, through the adjustment of In concentration or doping Al, wavelength will be moved to the invisible light blue, In fact nothing big breakthrough In the history of technology, energy is better than blue light only a few, range of application is given priority to with the curing light, heavy use of the exposure, traditional printing, 3 d printing.

Walk down the wavelength, the UV energy is becoming more and more strong, under 280 nm band called UVC, the destruction of the ability, can cut off most of the chemical compound links, also can damage cells of RNA and DNA, make its immediate death or lose their ability to reproduce, luckily the sun the UVC when flying to the earth, almost entirely by the ozone layer down to the block, could have burned up all the tremendous power of the ball, after destructive power cuts, reach the earth's low energy light (UVA/UVB), to create today's myriad life.

Disruptive UVC, if well control is applied, became the ideal light source to disinfection sterilization, to purify water, purify air, sterilize tableware or any articles for daily use, if the light source is small LED, UVC is not restricted to greatly a clean machine, water filter, which can produce many more suitable for use of new products and new applications.

However it is UV, UVC manufacturing difficulty compared with UVA, difficult of epitaxial, encapsulation is difficult, if use AlN substrate long jing, all aspects of the conditions is better, yes, but the price of materials is Sapphire (Sapphire) several times, good sad, want to do a good job in UVC epitaxial again to save costs, not some skills and experience, playing bad ground of Sapphire just just right; What's more, UVC's personality is too strong, too tough, and epochs and silicon, and the way to block UVC is all the end of muscles and veins, there is no room for negotiation.

Want to know, UVC has a mix name "deep ultraviolet light", deep, really deep! It is very clear that the general package can not be served at all, noble UVC, so it is enshrined in the highest specification of the ceramic substrate + quartz glass attic.

Efficiency? Single star UVC LED in 350 ma electrical flow, LG Innotek can do 100 mw, the highest level, the most UVCLED industry, UVC LED can make the uv light, the application of the implementation and upgrading, lock and have technical threshold of the market, and body top equipped with UVC, not capricious and can have rich, below 280 nm of the world, have to put down the burden figure aside, when an apprentice shallow heart practice and patience. On the other hand, UVC has a lot of room for improvement on the road of improved luminous efficiency, reduced cost, which means the possibility of future development.