Patent ID: 7727874
Filing Date: 2010-06-01
Classification: C30B,H01L

Abstract:
1. A method for making a non-polar GaN substrate, comprising: providing a non-polar GaN seed crystal including a top surface lying in a first non-polar plane, and one or more side walls adjoining the top surface, wherein the non-polar GaN seed crystal has a vertical dimension bounded by the top surface and a bottom surface, and a lateral dimension bounded by the one or more side walls and orthogonal to the vertical dimension; growing a vertical re-growth region from the top surface and a lateral re-growth region from the one or more side walls to form a re-grown GaN crystal, by growing GaN on the non-polar GaN seed crystal utilizing a vapor phase growth process, wherein the re-grown GaN crystal has a vertical dimension greater than the vertical dimension of the non-polar GaN seed crystal and a lateral dimension greater than the lateral dimension of the non-polar GaN seed crystal; and slicing the re-grown GaN crystal along a second non-polar plane to form a non-polar GaN substrate, wherein the non-polar GaN substrate has a lateral dimension along the second non-polar plane, and the lateral dimension of the non-polar GaN substrate is greater than the lateral dimension of the non-polar GaN seed crystal.