Patent ID: 7915145

Claim:
A silicon substrate manufactured from a single-crystal silicon produced by a CZ method, wherein the single-crystal silicon includes a carbon concentration equal to or higher than 1.0×10 16 atoms/cm 3 and equal to or lower than 1.6×10 17 atoms/cm 3 and an initial oxygen concentration equal to or higher than 1.4×10 18 atoms/cm 3 and equal to or lower than 1.6×10 18 atoms/cm 3 ; wherein the silicon substrate includes; a device formed on a front of the silicon substrate, and a random processing-influenced layer formed on a back face of the silicon substrate; wherein the silicon substrate has a thickness of equal to or more than 5 μm and equal to or less than 40 μm, and a residual stress of equal to or more than 5 Mpa and equal to or less than 200 Mpa applied to the random processing-influenced layer by polishing the back face of the silicon substrate at a pressure equal to or higher than 100 g/cm 2 and equal to or lower than 500 g/cm 2 for a polishing time equal to or longer than 10 seconds and equal to or shorter than 60 seconds; and the residual stress acts as extrinsic gettering.