Patent ID: 7582959

Claim:
A driver module structure comprising: a flexible circuit board provided with a wiring pattern; a semiconductor device mounted on the flexible circuit board; and an electrically conductive heat-radiating member joined to the semiconductor device, wherein the wiring pattern comprises a ground wiring pattern, the flexible circuit board has a cavity that exposes a portion of the ground wiring pattern, the exposed portion of the ground wiring pattern and the heat-radiating member are connected to establish electrical continuity via a member that is fitted into the cavity, and the cavity is a through hole penetrating the ground wiring pattern, a portion of the ground wiring pattern on an opposite side from the heat-radiating member is exposed, and the member fitted into the cavity is an electrically conductive screw that fastens the flexible circuit board and the heat-radiating member and provides electrical continuity between the exposed portion of the ground wiring pattern and the heat-radiating member.