Methods are provided for forming silicon dioxide (SiO2) on a silicon carbide (SiC) substrate. The method comprises: providing a SiC substrate; supplying an atmosphere including oxygen; performing a high-density (HD) plasma-based process; and, forming a SiO2 layer overlying the SiC substrate. Typically, performing the HD plasma-based process includes connecting a top electrode to an inductively coupled HD plasma source. In one aspect, SiO2 is grown on the SiC substrate. Then, an HD plasma oxidation process is performed that creates a reactive oxygen species and breaks the Si--C bonds in the SiC substrate, to form free Si and C atoms in the SiC substrate. The free Si atoms in the SiC substrate are bonded to the HD plasma-generated reactive oxygen species, and the SiO2 layer is grown.

 
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