Patent ID: 8487328

Claim:
A light emitting device comprising: a semiconductor package including: a light emitting element, a first conduction member, on one side of which the light emitting element is placed, and a second conduction member whose surface area is smaller than that of the first conduction member, the other side of the first conduction member and the second conduction member, on the opposite side from said one side, forms a lower face of the semiconductor package; and a mounting board connected with the semiconductor package by a joining member, the mounting board including a first wiring component including a narrow part and a wide part wider than the narrow part and extending away from the first conduction member, at least the narrow part of the first wiring component being joined to the first conduction member, and the first wiring component having a recess in its interior, a second wiring component including a narrow part and a wide part wider than the narrow part and extending away from the second conduction member, at least the narrow part of the second wiring component being joined to the second conduction member.