Patent ID: 7972892
Filing Date: 2011-07-05
Classification: H01L,Y10S

Abstract:
1. A method of forming a light emitting device comprising: epitaxially growing on a first main surface of a substrate bulk composed of a GaAs single crystal, a separation-assisting compound semiconductor layer composed of a III-V compound semiconductor single crystal having a composition different from GaAs; epitaxially growing a sub-substrate portion composed of the GaAs single crystal on the separation-assisting compound semiconductor layer; epitaxially growing, on a first main surface of the sub-substrate portion, a main compound semiconductor layer having therein a light emitting layer, the main compound semiconductor layer and the light emitting layer each having a first main surface and a second main surface; removing the separation-assisting compound semiconductor layer by chemical etching, to separate the substrate bulk from the sub-substrate, the sub-substrate separated from the substrate bulk being a residual substrate portion on the second main surface of the main compound semiconductor layer, the residual substrate portion having a first main surface and a second main surface; and cutting off a portion of the residual substrate portion to form a cut-off portion that exposes a portion of the second main surface of the compound semiconductor layer that serves as a light extraction surface with respect to an emission beam from the light emitting layer.