news digest ♦ LEDs
In the past, short wavelength UVLEDs have exhibited lifetimes of just a few hundred hours, but over the past several years, SETi has been steadily increasing this performance and having now achieved over 10,000 hours, the firm believes it has reached a milestone.
This demonstration represents a massive leap in operational performance for SETi and far exceeds lifetime for other conventional UV light sources. Based in Columbia, SC, SETi manufacture LEDs from 240nm through 360nm, all manufactured in compliance withISO9001 certification and is currently one of the leading commercial manufacturers of UV LEDs shorter than 365nm.
While this lifetime has not been released in the UVTOP product specifications, SETi does expect its UVTOP275 LEDs to exhibit L50 lifetimes approaching 5,000 hours and is developing future products to meet extended lifetime specs.
MOCVD reactors for GaN LEDs just got bigger
The 16x4inch or 69x2inch tool for gallium nitride based LED production has been unveiled by German headquartered compound semiconductor equipment manufacturer, Aixtron.
Aixtron is raising the bar again by setting a new benchmark for MOCVD reactor capacity, throughput and LED production cost.
With the introduction of the new Aixtron CRIUS II- L, what the firm says is the world’s largest capacity MOCVD reactor is now available with a 16x4 inch or 69x2 inch capacity. This new reactor evolution is based on the already market proven CRIUS II platform which was introduced very successfully in 2010, guaranteeing customers a seamless transfer of qualified high performance LED processes.
“Reduction of manufacturing cost is a key issue in the LED industry, in particular when looking at the required cost reduction for solid state lighting products. After having analysed MOCVD related manufacturing cost, it was obvious that the reactor capacity remains the key parameter with the strongest influence on operating cost”, states Rainer Beccard, Vice President Marketing at
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www.compoundsemiconductor.net August/September 2011 Aixtron.
“This new CRIUS II-L is the largest capacity manufacturing-proven MOCVD reactor available in the world today, allowing a fast reduction in LED chip cost. It offers unsurpassed capacity and throughput, combined with an outstanding yield due to its excellent uniformity and reproducibility. The CRIUS II-L reactor is design optimised for wafer sizes from 2 to 8 inch and offers the potential for even further productivity enhancements.”
As with previous generations, the CRIUS II-L reactor is based on the Close Coupled Showerhead (CCS) concept, which as a key-enabling technology has a well proven track record in being easily scalable with a seamless and short process transfer. The CCS technology is well established in many markets with an excellent reputation and known to enable straight-forward process tuning, stable and robust processes and superior performance of LEDs.
Avago oval LEDs raise the bar for viewing full-colour displays
The company says its latest through-hole indium gallium nitride and phosphide LED series reduce power consumption and provide consistent light from all angles.
Supplier of analogue interface components for communications, industrial and consumer applications, Avago Technologies, has released three series of high-brightness oval through-hole LEDs.
The new red AlInGaP LEDs are available at 626-nm dominant wavelength, and the new green InGaN and blue InGaN LEDs are available at 530-nm and 470-nm, respectively. The maximum luminous intensity at 20 mA of the new LEDs is as follows (measured in millicandelas):
* 4 mm standard oval HLMP-Lx75 LEDs: Red – 2400, Green – 6050 and Blue – 1660 * 5 mm standard oval HLMP-Hx74/75 LEDs: Red – 2400, Green – 6050 and Blue – 1380 * 5 mm mini oval HLMP-Ax74/75 LEDs: Red –
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