Patent ID: 7615203
Filing Date: 2009-11-10
Classification: C30B,Y10T

Abstract:
1. A single crystal diamond grown by vapor phase synthesis, wherein when one main surface is irradiated with a linearly polarized light considered to be the synthesis of two mutually perpendicular linearly polarized light beams, the phase difference between the two mutually perpendicular linearly polarized light beams exiting another main surface on the opposite side is, at a maximum, not more than 50 nm per 100 μm of crystal thickness over the entire crystal, wherein the single crystal diamond has a thickness of at least 200 μm and not more than 1500 μm, and a half-width between 10 and 80 seconds in an X-ray rocking curve in a (400) plane over an entire crystal, and has, as impurities, a concentration of hydrogen atoms between 20 and 70 ppm and a concentration of nitrogen atoms between 0.01 and 100 ppm.