Plessey announced the release of their range of MaGICTM LED die, manufactured on the company’s patented GaN-on-Silicon technology. The blue die, also referred to as blue pump for its ability to pump phosphor to a white colour range, is the latest innovation in high brightness LED die designed for a range of medium to high power applications that include general lighting, signage, commercial, residential and street lighting.https://cdn.specpick.com/images/photonics/images_300.jpeg712370
Plessey CTO, Dr. Keith Strickland, said that they had developed a range of LED die for multiple applications and their GaN-on-Silicon technology worked in high power applications such as high bay, street lights, projector lamps, spot lamps and floodlighting. The current process technology has become the base for their application specific LEDs, the ASLED, which bridges the gap between LED component suppliers, solid state lighting fixture designers and the OEMs.
The manufacturing process produces a vertical LED structure which has the anode as bottom contact, and the cathode formed in the top metal layer. The layout of the top metal layer is optimised for a particular LED size and die operating current, and includes one or more bond pads for connecting to the cathode.
Giuliano Cassataro, Plessey’s VP Global Sales, said that they were seeing a move away from discrete PLCC designs, especially in the higher power applications. Plessey provides the flexibility and speed of response required for a range of high-end applications that use the thermal and light output from their silicon LED die with their own growth and semiconductor processing facility in Plymouth.
Plessey offered their range of blue die in various wavelength options. The die are supplied a standard thickness of 150μm, whilst other thicknesses can be supplied, down to a minimum of 75μm capable of generating over 60% light output efficiency, sometimes referred to as wall plug efficiency (WPE).
The die are supplied on a blue tape in single intensity and colour bins to provide close uniformity, and are intended to be used with standard pick and place machines. Samples are available in a variety of die pack formats with blue die wavelengths ranging from 420nm to 480nm and from mW to 10W with the PExS4500 range having a typical optical output power of 4000mW from a 3A drive current.