Patent ID: 8415681

Claim:
A semiconductor light emitting device, comprising: a lead frame including a plate-like semiconductor light emitting element mounting portion having a semiconductor light emitting element mounted on a main surface, and a plate-like metal wire connecting portion extending over a same plane as said semiconductor light emitting element mounting portion; a metal wire electrically connecting said semiconductor light emitting element and said metal wire connecting portion; a sealing resin so as to completely cover said semiconductor light emitting element and said metal wire; and an insulator provided along an exterior periphery of said lead frame, and having a thickness not greater than a thickness of said lead frame, wherein: between said semiconductor light emitting element mounting portion and said metal wire connecting portion, a slit-like groove is formed, which extends from a main surface of said lead frame to a rear surface of said lead frame opposite to the main surface; and at least one of said plate-like semiconductor light emitting element mounting portion and said plate-like metal wire connecting portion has a wedge structure formed inside said plate-like semiconductor light emitting element mounting portion and said plate-like metal wire connecting portion defined along a cross-sectional view, for preventing said insulator from peeling, formed on a periphery of said at least one of said plate-like semiconductor light emitting element mounting portion and said plate-like metal wire connecting portion in an area other than in a surface of said slit-like groove.