Norstel’s commercial product range includes 50.8mm, 76.2mm and 100mm diameter 4H semi-insulating Silicon Carbide (SiC) substrates that are available in on-axis orientation. Semi-insulating wafers are grown with Norstel’s patented HTCVD growth technology. These products have been developed and extensively verified by Norstel customers and within the major European microelectronics development programs “Korrigan” and “MANGA”. Our unique HTCVD crystal growth technology is the key to purer products combining high and uniform resistivity with a low density of defects. Norstel has a significant amount of Intellectual Property related to HTCVD and the production of Semi-insulating wafers. For specification information please download the Semi-insulating SiC Product Flyers or contact us by e-mail at

2″ on-axis SI wafer 3″ on-axis SI wafer 100mm on-axis SI wafer