Patent ID: 6468347
Filing Date: 2002-10-22
Classification: C30B,H01L

Abstract:
A method of growing a GaN single crystal comprising the steps of:synthesizing GaN in vapor phase by supplying material gases including HCL gas and NH3 gas; piling a GaN crystal on a substrate at a high temperature; producing a three-dimensional facet structure including facets and polygonal facet pits with boundaries made by the facets in the GaN crystal without making a flat surface; maintaining the facet structure without burying the facet structure by decreasing temperature, enhancing HCl partial pressure, raising NH3 partial pressure or heightening a growing speed; sweeping dislocations existing in the facet pits to the boundaries of the pits by continuing the faceted growth in a vertical direction to the substrate; accumulating the boundary assembled dislocations to bottom confluences of the pits by continuing the faceted growth; making bundles of the dislocations below the pits; and reducing dislocations in the growing GaN crystal.