• A spiral waveguide
  • A photonic chip integrated to a PCB
  • Coupling light into a spiral waveguide
  • A wide-band MMI



SPIE Photonics West



Dr Callum Littlejohns will be presenting a CORNERSTONE invited talk at SPIE Photonics West at 11am on Monday 4th February 2019 at The Moscone Centre, San Francisco, USA.


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Future Calls

The 2019 CORNERSTONE MPW schedule has been announced.





There are three UK academic institutions involved as capability providers:

University of Southampton (wafer-scale processing)
University of Glasgow (chip-level processing)
University of Surrey (ion implantation)

Welcome to the CORNERSTONE website

CORNERSTONE is a rapid prototyping multi-project-wafer (MPW) capability that utilises industrially-compatible tools (e.g. deep-UV projection lithography), to enable seamless scaling-up of production volumes, whilst also retaining device level innovation capability using high-resolution lithography (e-beam) and versatile processes. The TRL 5 technology platform is a collaboration between the Universities of Southampton, Glasgow and Surrey in the UK, with the majority of the processing taking place in the Optoelectronics Research Centre’s cleanrooms at the University of Southampton, where a 248 nm Nikon Scanner is installed. Lower TRL opportunities are also available for researchers and innovators to test experimental designs. Presently, CORNERSTONE offers 3 different silicon-on-insulator platforms (220 nm Si / 2 µm BOX, 340 nm Si / 2 µm BOX and 500 nm Si / 3 µm BOX), enabling a plethora of applications including telecoms, mid-infrared sensing etc. The unique hybrid processing (DUV projection lithography and e-beam lithography) capability renders the CORNERSTONE platform attractive to both academia and industry, and is able to mimic advanced industrial processes.

CORNERSTONE is an open access technology which operates approximately 6 MPW calls per year, in addition to bespoke fabrication batches (available on request).

If you have any queries you can email us at This email address is being protected from spambots. You need JavaScript enabled to view it..

Additionally, the capabilities of the Silicon Photonics Group at the University of Southampton can be downloaded below.