Patent ID: 7754504
Filing Date: 2010-07-13
Classification: H01L

Abstract:
1. A method for making a light-emitting diode, comprising the steps of: providing a substrate having a plurality of recessed portions on one main surface, each of the recessed portions having a floor and sidewalls; growing a first nitride-based III-V group compound semiconductor layer (1) initially only from the floors of the recessed portions without using a mask so that the first nitride-based III-V group compound semiconductor initially exhibits a triangle in section in each recessed portion and having the floors of the recessed portions as bases, (2) thereafter continuing to grow the first nitride-based III-V group compound semiconductor until it r buries the recessed portion, (3) thereafter continuing to grow the first nitride-based III-V group compound semiconductor under such conditions that lateral growth is predominant until the first nitride-based III-V group semiconductor from adjacent recessed portions mutually contact each other, and (4) continuing to grow the first nitride-based III-V group compound semiconductor at least until it forms a first nitride-based III-V group layer with a planar surface; growing a second nitride-based III-V group compound semiconductor layer on the first nitride-based III-V group compound semiconductor layer; and successively growing a third nitride-based III-V group compound semiconductor layer of a first conduction type, an active layer and a fourth nitride-based III-V group compound semiconductor layer of a second conduction type on the second nitride-based III-V group compound semiconductor layer.