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Plessey expands GaN-on-silicon LED die portfolio

Posted: 10 Aug 2015     Print Version  Bookmark and Share

Keywords:Plessey  GaN-on-silicon  LED die  OEM  lighting 

Plessey has unleashed its line-up of MaGIC LED die, developed on the company's patented GaN-on-Silicon technology. According to the company, the blue die, sometimes referred to as blue pump for their ability to pump phosphor to a white colour range, are the latest innovation in high brightness LED die aimed at a range of medium to high power applications such as general lighting, signage, commercial, residential and street lighting.

Plessey CTO Keith Strickland said, "We have developed a wide range of LED die for a number of applications and our GaN-on-Silicon technology works particularly well in higher power applications such as high bay, street lights, projector lamps, spot lamps and floodlighting. This current process technology will become the base for our 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 that 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.

Plessey offers its blue dies in various wavelength options. Capable of generating over 60 per cent light output efficiency, sometimes referred to as wall plug efficiency (WPE), the die are supplied to a standard thickness of 150µm, whilst other thicknesses can be supplied, down to a minimum of 75µm.

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 with the PExS4500 range having a typical optical output power of 4000mW from a 3A drive current.

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