Power Electronics

Plessey Invests In High Brightness LED Production Line

Plessey Semiconductors has taken delivery of a CRIUS II-XL reactor in a 7x6-inch wafer configuration from AIXTRON, as the first part of a multi-million pound investment to create a production line for its new High Brightness LED (HBLED) products. These will use Plessey's MaGIC™ (Manufactured on GaN ICs) technology of GaN on 6-inch silicon substrates. Manufacturing will be at the company's Plymouth facility creating new high tech manufacturing jobs for the UK.

Neil Harper, Plessey's HBLED Product Line Director, explained, "We use a much thinner GaN layer at only 2.5µm compared to 6-8µm in other GaN on Si technologies. This means less deposition time so that we can do multiple production cycles in the reactor in 24 hours to achieve higher throughputs and lower costs."

Plessey is one of the first companies to make working GaN on Si LEDs with the first samples producing the correct wavelength output from Plessey's 6-inch IC production line.

Plessey is using standard, readily available 6 inch silicon substrate which offers significant cost reductions in the order of 80% compared to the current technologies using Silicon Carbide or Sapphire that are expensive and hard to scale up. Plessey intends to move to 8-inch substrates in the future for even greater cost savings. Efficiencies in the new technology will enable outputs in excess of 150 lumens per watt to be achieved, which is significantly brighter than anything commercially available. Typical MAGIC HB LEDs are yielding at 95% providing over 14,000 1 sq. mm 1 Watt MAGIC HB LEDs per 6-inch wafer.

Barry Dennington, Plessey's COO, added, "MaGIC and EPIC are two unique, disruptive technologies that are instrumental in our plan to rapidly grow Plessey into a major electronics company producing smart lighting solutions."

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