Patent ID: 7994027

Claim:
A microwave-based sublimation-sandwich silicon carbide (SiC) polytype growth method comprising: a. creating a sandwich cell by placing a source wafer parallel to a substrate wafer, leaving a small gap between the source wafer and the substrate wafer; b. placing a microwave heating head around the sandwich cell to selectively heat the source wafer to a source wafer temperature and the substrate wafer to a substrate wafer temperature; c. creating a temperature gradient between the source wafer temperature and the substrate wafer temperature; d. sublimating silicon (Si-) and carbon (C-) containing species from the source wafer, producing Si- and C-containing vapor species; e. converting the Si- and C-containing vapor species into liquid droplets of metal-ion alloys by allowing the substrate wafer to absorb the Si- and C-containing vapor species; and f. growing nanostructures on the substrate wafer once the alloys reach a saturation point for SiC.