Patent ID: 6964705
Filing Date: 2005-11-15
Classification: C30B,H01L

Abstract:
1. A method of producing a semiconductor crystal of a Group III nitride compound semiconductor, said method comprising: laminating a seed monolayer or multilayer on a starting substrate; chemically or physically etching part of a seed layer-forming surface of said starting substrate to thereby partially or dispersively leave said seed layer as a plurality of non-etched portions on said starting substrate; growing said semiconductor crystal on exposed surfaces of said non-etched portions of said seed layer as initial crystal growth surfaces for starting growth of said semiconductor crystal until said crystal growth surfaces are connected to one another by crystal growth so as to be provided as at least one series of approximately flat surfaces; and breaking said non-etched portions to thereby separate said semiconductor crystal from said starting substrate, wherein the crystal growing is performed by a halide vapor phase epitaxy method in the condition that a supply ratio of a Group V material to a Group III material is in a range of from 30 to 80, both inclusively.