Patent ID: 8633506

Claim:
A semiconductor light emitting device comprising: a semiconductor light source; a resin package surrounding the semiconductor light source, the resin package including a bottom surface; a first lead fixed to the resin package; a second lead spaced apart from the first lead, the second lead including a thin portion and a thick portion formed integral with the thin portion; and a wire connecting the semiconductor light source and the second lead to each other; wherein the first lead is provided with a die bonding pad for bonding the semiconductor light source and with an exposed surface opposite to the die bonding pad and exposed in the bottom surface of the resin package to an outside of the resin package, the exposed surface as a whole being completely surrounded by the resin package in an in-plane direction of the exposed surface, wherein the wire is bonded to the thick portion of the second lead, and the thick portion of the second lead is exposed in the bottom surface of the resin package, and wherein the die bonding pad has widths different stepwise in a longitudinal direction of the die bonding pad.