Patent ID: 8119534

Claim:
A method of manufacturing a substrate for a light emitting device that has a plurality of protrusions on a surface of the substrate where semiconductor layers of the light emitting device are formed, the method comprising: a first step of preparing a substrate that is configured so that light from the light emitting device passes through the substrate and etching a part of the substrate with a protective film provided on the substrate and forming protrusions having side faces; a second step of exposing and etching the side faces and at least a part of top faces of the protrusions so as to make an inclination angle of side faces on a lower side of the protrusions larger than an inclination angle of side faces on an upper side of the protrusions; and a third step following the second step of exposing and etching the side faces and at least a part of the top faces of the protrusions so as to form the side faces into curved surfaces.