Patent ID: 8815392
Filing Date: 2014-08-26
Classification: C30B,H01L,Y10T

Abstract:
1. A gallium arsenide single crystal, comprising a charge carrier concentration of at least 1×10 16 cm −3 and at most 1×10 18 cm −3 , wherein an optical absorption coefficient of the gallium arsenide single crystal is at most 2.5 cm −1 at a wavelength of 1000 nm, at most 1.8 cm −1 at a wavelength of 1100 nm and at most 1.0 cm −1 at a wavelength of 1200 nm, wherein the area density of etch pitches on cross-sections perpendicular to the crystal axis does not exceed 1500 cm −2 , and wherein an EL 2-concentration is below 10 16 cm −3 .