We are an open source, license free Silicon Photonics rapid prototyping foundry 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 differentiates CORNERSTONE from other foundries.

We offer 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. All available via multi-project-wafer runs or bespoke fabrication batches.

We pride ourselves on our ability to support researchers at all stages of their career.