Patent ID: 8823130

Claim:
A method for manufacturing a bonded SOI wafer by bonding a bond wafer and a base wafer together, the method comprising manufacturing the bonded SOI wafer by using a silicon epitaxial wafer as the bond wafer and/or the base wafer, wherein the silicon epitaxial layer is manufactured by a method comprising: growing the epitaxial layer by vapor phase epitaxy on a main surface of a silicon single crystal substrate such that the epitaxial layer has a dopant concentration of 1×10 19 /cm 3 or more, wherein the main surface of the silicon single crystal substrate is tilted with respect to a [100] axis at an angle θ in a [011] direction or a [0-1-1] direction from a (100) plane and at an angle φ in a [01-1] direction or a [0-11] direction from the (100) plane, and the angle θ and the angle φ are less than ten minutes.