Intematix Corporation has been issued its patent covering red nitride phosphor compositions used in LEDs by the United States Patent and Trademark Office (USPTO).
The patent was allowed in August and officially issued on September 25th 2012.
Intematix's U.S. Patent No. 8,274,215, entitled "Nitride-based Red Phosphors" is the 18th U.S. patent issued to Intematix in the area of LED phosphors and the 71st U.S Patent overall.
"Our novel chemical formulation lowers the concentration of oxygen impurities in the material structure, leading to improved reliability under high temperature and humidity conditions," explains Yi-Qun Li, Chief Technology Officer at Intematix, "This design increases light output efficiency and produces longer emission wavelengths when powered by the blue light from the LED chip."