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Technical Insight

Cree doubles blue LED performance again (LED News)

Cree recently unveiled a new version of its high-brightness InGaN-on-SiC blue LED that doubles the output of its UltraBright device introduced last October. Called MegaBright, the company s new LED operates at a dominant wavelength of 470 nm and exhibits a typical brightness of 10 mW (at 30 mA). This output mat-ches the highest brightness of sapphire-based devices, says the company. The MegaBright device is based on the same shaped-chip geometry as the UltraBright device, having a top area of 300 m2 and a p-n junction area of 240 m2 (see Compound Semiconductor November 2000, p11). Cree says the emitter is designed for full-color outdoor video displays, automotive lighting and PDA backlighting. Other applications for the device include architectural illumination and contour lighting, and patio and special effects lighting. Over the last three years Cree says it has increased the brightness of its LED products by a factor of ten. "We have made tremendous progress increasing the brightness of our silicon carbide-based LEDs," said Neal Hunter, chairman and CEO. "Our LEDs now exceed sapphire-based devices at a price/performance point unequaled in the nitride industry. The brightness we ve achieved places the company squarely in the forefront of volume production devices at the 10 mW level." Evaluation and qualification samples are now on offer, with volume production expected this month.
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