Patent ID: 7211142
Filing Date: 2007-05-01
Classification: C30B

Abstract:
1. A method for producing a CdTe single crystal, wherein the CdTe single crystal has a chlorine concentration between 0.1 and 1.0 ppmwt in the crystal and has a resistivity at room temperature of not less than 1.0×10 the CdTe single crystal is obtained according to any one of a vertical gradient freezing method, a horizontal gradient freezing method, a vertical Bridgman method, a horizontal Bridgman method, and a liquid encapsulated Czochralski method, by using as a raw material a CdTe polycrystal which is produced by doping 50 to 200 ppmwt of chlorine in a CdTe polycrystal which shows an n-type electric property of carrier concentration being not more than 1.0×10