We have investigated deep levels in 6H-SiC wafers grown by a modified Lely method and step-controlled epitaxial layers by transient capacitance methods. Several deep electron traps, Of which concentrations were on the order of 10(15) CM-3, located at 0.39-0.69 eV below the conduction band edge were observed in the 6H-SiC wafers. However, the epitaxial layers by step-controlled epitaxy had very few traps of which concentrations were below the detection limit (< 10(13) Cm-3).