We use the term "template" to describe our products as they are different to substrates. Specifically, a template is a composite or engineered substrate, where one or more layers are added to the original susbstrate.
Seren Photonics grows semi-polar GaN (11-22) on m-plane sapphire and non-polar GaN (11-20) on r-plane sapphire.
In the case of semi-polar GaN, the advantage of the template approach is that cost is significantly reduced when compared to bulk GaN and more importantly, templates can be grown on 2", 4" and even 6" sapphire, whereas semi-polar bulk-GaN is still only available in small pieces.
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