According to Oxford Instruments , it has sold its 400th plasma system to a Chinese HBLED supplier. Dan Ayres, Managing Director of Oxford Instruments Plasma Technology ,said that "It gives me a great sense of achievement to say that we have helped to enable the HBLED revolution.Our systems play a vital role in manufacturing HBLEDs, and we have served the industry as it has developed from its R&D roots into the global industry it is today.” Ayres continues, “We have been able to offer systems for high performance every step of the wa...

Group III-nitride materials have been widely used for visible and ultraviolet LEDs and blue, violet laser diodes in the past decade. Most of these optoelectronic devices are typically fabricated on the conventional polar (0001) c-plane oriented substrate materials. Devices grown on the polar substrate orientation suffer undesirable spontaneous and piezoelectric polarization resulting in significant band bending in the quantum well. This reduces radiative recombination efficiency and lowers device performance.