Patent ID: 8847236

Claim:
A semiconductor substrate comprising: a silicon substrate; a monocrystalline silicon carbide film disposed on a surface of the silicon substrate; and a stress relieving film disposed on a first surface of the silicon substrate opposite from the side on which the monocrystalline silicon carbide film is disposed, the stress relieving film compressing the first surface of the silicon substrate towards a center of the first surface and that relieves stress in the silicon substrate by applying compressional stress to the silicon substrate surface on which the stress relieving film is disposed, the stress relieving film in contact with and extending along an entire surface of the silicon substrate, wherein a plurality of spaces are present in the monocrystalline silicon carbide film in portions on the side of the silicon substrate and along an interface between the monocrystalline silicon carbide film and the silicon substrate, a width of the spaces being less than twice a thickness of the monocrystalline silicon carbide formed over the spaces.