Australian firm BluGlass Limited has successfully facilitated for its customer, Seren Photonics Limited, the transfer of their GaN template process to the BluGlass MOCVD platform. Seren Photonics of the UK develops semi-polar gallium nitride (GaN) products.
Since November 2016, BluGlass has been working with Seren (BluGlass News Release) with the goal of transferring the process from laboratory-scale equipment onto a mass production suitable MOCVD platform. BluGlass points out that semi-polar gallium nitride (GaN) is an alternative GaN template for the fabricating LEDs, which overcomes several of the issues related to the green gap (inability to make efficient green LEDs using MOCVD). According to BluGlass, semi-polar GaN also has the potential to address LED efficiency droop, in which the LEDs become gradually less efficient as input power increases.
Semi-polar GaN was previously only available in small pieces cut from a bulk GaN crystal. Seren has developed template process that creates high-quality semi-polar GaN on industry standard 2”, 4” and 6” sapphire wafers. BluGlass and Seren are collaborating to produce and demonstrate commercially viable semi-polar devices including testing the use of BluGlass’ proprietary RPCVD technology to improve the performance of green LEDs.
BluGlass says it will continue to work with its customer Seren. Future development will now focus on refining the manufacturing process including improving uniformity and yield. Parallel development will continue to target a further reduction in defect density.
Seren Chief Development Officer, Dr. Bedwyr Humphreys, said, “It’s great to see a process that was developed in a university lab successfully scale up on to a production relevant platform. The focus now is on moving the product development to the next stage where we can start to look at refining the process. We had always designed the process with production in mind so it’s really exciting to see this basic process demonstrated on a 19 x 2” MOCVD reactor, which now means we can sample in much larger quantities than before.”