Patent ID: 7719119

Claim:
A semiconductor device comprising a semiconductor element and a wiring board, the wiring board having: a substrate having a first surface and a second surface opposite the first surface; a first metal pattern and a second metal pattern formed on the first surface and the second surface, respectively; an upper electrode formed on and protruding above the first metal pattern; an external terminal protruding above the second metal pattern; a penetrating electrode formed with a metal plate layer penetrating the substrate to provide a connection between the upper electrode and the external terminal; a first insulating film covering at least the first metal pattern except for a portion of the upper electrode; and a second insulating film covering at least the second metal pattern except for a portion of the external terminal, wherein the semiconductor element is placed over the first surface of the substrate and connected to the upper electrode the external terminal is disposed such that a height of a principal surface of the external terminal relative to the second surface is larger than a height of a surface of the second insulating film relative to the second surface, the external terminal comprises a first metal layer and a second metal layer covering the first metal layer and the second metal pattern, and forming a first stepped portion between the first metal layer and the second metal pattern, the second metal layer is in touch with the second metal pattern, and the second metal layer is in touch with the second surface forming a second stepped portion.