Silicon carbide was the 1st commercially significant semiconductor material. A crystal radio "carborundum" (artificial silicon carbide) detector diode was patented by Henry Harrison Chase Dunwoody in 1906. It identified A great deal early use in shipboard receivers. 2.Oxygen inhibition layer of composite resins: consequences of layer thickness and floor layer https://rylansrplg.wikicorrespondence.com/4715837/the_definitive_guide_to_sic_semiconductor