Patent ID: 7745246
Filing Date: 2010-06-29
Classification: H01L

Abstract:
1. A method of fabricating a light emitting device comprising: a light emitting device wafer fabricating step of fabricating a light emitting device wafer having a light emitting layer section based on a double heterostructure in which a first-conductivity-type cladding layer, an active layer and an second-conductivity-type cladding layer, each of which being composed of a compound having a composition allowing lattice matching with GaAs, out of compound expressed by formula (Al a surface roughening step of forming surface roughening projections by etching the first main surface of the GaP light extraction layer, using an etching solution for surface roughening; and a dicing step of dicing the light emitting device wafer to light emitting device chips, wherein on the light emitting device wafer fabricating step, the GaP light extraction layer is formed to have a principal crystal axis thereof off-angled in a degree range of 1° to 25°, both ends inclusive, from <100> direction, so as that a P-rich off-angled {100} surface, having a higher existence rate of P atoms than an exact {100} surface, appears on the first main surface thereof, the etching solution for surface roughening at the surface roughening step contains: acetic acid (on CH hydrofluoric acid (on HF basis): 2% by mass or more and 8% by mass or less; nitric acid (on HNO iodine (on I