CORNERSTONE brings the future closer by turning your ideas into reality. We are an open source, license free Silicon Photonics rapid prototyping foundry based in the UK. Our prototyping platforms utilise industrially-compatible deep-UV projection lithography to enable seamless scaling-up of production volumes, whilst also retaining device level innovation capability using high-resolution e-beam lithography and versatility in our process flows. This process flexibility and open source model is what differentiates CORNERSTONE from other foundries.


We offer a wide range of Silicon Photonics platforms including 3 different silicon-on-insulator platforms and a 300nm thick silicon nitride platform, as well as suspended-silicon and 3 µm thick germanium-on-silicon platforms to support emerging mid-infrared applications such as sensing. All of our platforms are available via scheduled multi-project-wafer runs or bespoke fabrication batches available on-demand.


Our diverse team are part of the Silicon Photonics groups at the Universities of Southampton and Glasgow, with several decades of experience in the field. We pride ourselves on our customer service and our ability to support researchers at all stages of their career. 

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