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6 August 2015

Plessey releases range of GaN-on-Si blue LED die

UK-based Plessey has announced the release of its range of MaGIC (Manufactured on GaN-on-Si I/C) LED die, manufactured on the company's patented GaN-on-silicon technology. 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 designed for a wide range of medium to high power applications including general lighting, signage, commercial, residential and street lighting.

Plessey's 4.5mm high-power LED die. Picture: Plessey's 4.5mm high-power LED die.

"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," says chief technology officer Dr Keith Strickland. "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 optimized for a particular LED size and die operating current, and includes one or more bond pads for connecting to the cathode.

"We are seeing a definite move away from discrete PLCC designs, especially in the higher-power applications," notes Giuliano Cassataro, VP global sales. "By having our own growth and semiconductor processing facility in Plymouth, Plessey provides the flexibility and speed of response required for a vast range of high-end applications that can use the thermal and light output from our silicon LED die," he adds. 

Plessey's 1mm die for 350mA. Picture: Plessey's 1mm die for 350mA.

Plessey is offering its range of blue die in various wavelength options. Capable of a light output efficiency (wall-plug efficiency, WPE) of over 60%, the die are supplied to a standard thickness of 150μm (although 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 & place machines. Samples are available in a variety of die pack formats with blue die wavelengths ranging from 420nm to 480nm and from 1mW to 10W, with the PExS4500 range having a typical optical output power of 4000mW from a 3A drive current. 

Tags: Plessey GaN-on-Si HB-LEDs

Visit: www.plesseysemiconductors.com/led-plessey-semiconductors.php

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