CompoundTek provides world class silicon photonics wafer fabrication and on wafer optical testing services. Wafer fabrication - One and only 8 inch fab using ArF scanner to define silicon waveguide - 1st Si photonics commercial foundry with 3sigma variation CML model for more accurate Si photonics product design/Design for Manufacturing (DFM) Testing - First in the world to provide on wafer edge coupling & vertical grating coupling testing service which helps our customers to save cost and timely yield feedback to the fab.