High Power 365nm i-LED (UV)

NewBie

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I could not find any posts on this part in the search engine.

Typical power input 500mA at 4.5V. Optical power output 100mW, at 365nm, 10nm half width.

Whats unique about this part is high power at 365nm.

See:

Press release:
http://www.nichia.co.jp/info/news/new-iled.html

URL of Part:
http://www.nichia.co.jp/product/led-smd-powerled.html

NCCU033. Click on the part number for the datasheet, you'll need to sign up if haven't yet, here:
http://www.nichia.co.jp/members/regist.html

Datasheet here:

http://www.nichia.co.jp/specification/powerled/NCCU033.pdf
 

IsaacHayes

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yeah, I made a post about this saying it was interesting in another thread, but that's all. They also have a Siruis? I think one that is 385nm, still pretty good for LED. Can you imagine 2 of each kind in a maglight? that'd be pretty bright!

edit: I wonder how stable these will be? How long it will be before the led die eats itself? esp. the 365nm one.
 

NewBie

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[ QUOTE ]
IsaacHayes said:
yeah, I made a post about this saying it was interesting in another thread, but that's all. They also have a Siruis? I think one that is 385nm, still pretty good for LED. Can you imagine 2 of each kind in a maglight? that'd be pretty bright!

edit: I wonder how stable these will be? How long it will be before the led die eats itself? esp. the 365nm one.

[/ QUOTE ]

I've spoken to Nichia, CREE, and Toyoda Gosei, and they all say that the die doesn't get "ate" whatsoever.

I'd sure like to get to the root of where that rumor came from.

FYI,

TOKYO, JAPAN - March 4, 2002 - Nichia Corporation announced today the development of high power indium gallium nitride (InGaN) LEDs achieving ten times the electrical power of current parts. The high power LEDs are housed in heat and UV resistant surface mount packages that can be installed using standard automated assembly methods (including solder reflow).
"Assembly manufacturers need components that are easy to install," said Noboru Tazaki, Managing Director and General Manager of Nichia's Optoelectronics Products Division. "Nichia's high power LEDs represent advanced technology, but more importantly the parts can be mounted with automated assembly equipment."

The new Nichia LEDs overcome low power limitations of current parts by increasing the area of the InGaN chip to 1 mm2 and powering the chip with up to two watts of electrical power. At a 350 mA current, photometric luminous flux for the packaged LEDs is 23 lm for white, 7 lm for blue, 28 lm for blue-green, and 20 lm for green.

Nichia developed two new packages to house the larger area InGaN chip. The NCCU001 is an entirely inorganic package; no organic plastics or organic resins are used. As a result, the package is resistant to the increased heat generated by larger area chips and is ideal for housing UV-emission InGaN LED chips. Lifetime is estimated at 100,000 hours.

The second new Nichia package, the NCCx002, dissipates heat using an integrated copper heat sink. The result is an LED package with an 8° C / W thermal resistance, approximately twenty times lower than conventional LED packages. The package has a resin optic lens, making the part well suited for channel letter displays, traffic signals, and other specialty lighting applications.

Engineering samples of the parts will be available in Q2 of calendar 2002. Samples of the NCCU001 include InGaN chips emitting nearly 100 mW of 380 nm UV light at 500 mA, a world first. The thermal resistance of the NCCU001 is 15° C / W; the part is one centimeter square with a 2.3 mm height. The NCCx002 has an 11.2 mm width, 7.2 mm length, and 6 mm height; its estimated lifetime is 50,000 hours.

http://www.nichia.co.jp/info/news/new20020304.html
 

Canuke

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Nichia developed two new packages to house the larger area InGaN chip. The NCCU001 is an entirely inorganic package; no organic plastics or organic resins are used. As a result, the package is resistant to the increased heat generated by larger area chips and is ideal for housing UV-emission InGaN LED chips. Lifetime is estimated at 100,000 hours.

It sounds to me like they are attributing the short lifetime of UV LED's to the resin and other organic packaging materials, and fixed that.

That is completely different from the "self-eating" process described here on CPF where the crystal lattice itself is destroyed by the UV photons. That doesn't sound fixable at all by something that simple; the InGaN itself isn't organic.

So I too would like to know what's up here.
 

NewBie

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Well, every LED manufacturer, including LED die makers still have indicated nothing eats the semiconductor. Just the packaging/bonding materials.

Toyoda-Gosei even offers a long life white RGB phosphor LED, and even a UV LED, two years now, still running strong.

Sounds like a fable to me...
 
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