Patent ID: 7807126

Claim:
A diamond single crystal substrate manufactured by a method comprising: preparing a diamond single crystal seed substrate which has a main surface whose planar orientation falls within an inclination range of not more than 8 degrees relative to a {100} plane or a {111} plane, as a seed substrate; forming on the main surface a plurality of planes of different orientations which are inclined in the outer peripheral direction of the main surface relative to the main surface on one side of the seed substrate, by machining, wherein the planar orientation of the plurality of planes is within an inclination range of at least 1 degree and not more than 8 degrees relative to the {100} plane or the {111} plane; and growing a diamond single crystal on the seed substrate by vapor phase synthesis, in which the growth width in the lateral direction from the seed substrate in a single crystal layer obtained by vapor phase synthesis is greater than the growth width in the upward direction from the seed substrate.