Silicon single crystal wafer having few defects wherein nitrogen is doped and a method for producing it

Abstract

There is disclosed a method for producing a silicon single crystal wafer wherein a silicon single crystal is grown in accordance with the CZ method with doping nitrogen in an N-region in a defect distribution chart which shows a defect distribution in which the horizontal axis represents a radial distance D (mm) from the center of the crystal and the vertical axis represent a value of F/G (mm2/° C.·min), where F is a pulling rate (mm/min) of the single crystal, and G is an average intra-crystal temperature gradient(° C./mm) along the pulling direction within a temperature range of the melting point of silicon to 1400° C. There can be provided a method of producing a silicon single crystal wafer consisting of N-region where neither V-rich region nor I-rich region is present in the entire surface of the crystal by CZ method, under the condition that can be controlled easily in a wide range, in high yield, and in high productivity.

Dependencies are inferred from the claim text.