Patent ID: 7489036

Claim:
A thin-film device comprising: a substrate having a first surface and a second surface that face toward opposite directions, and a side surface coupling the first and second surfaces to each other; a protection film disposed such that one of surfaces thereof faces toward the first surface of the substrate; a conductor layer disposed between the first surface of the substrate and the protection film, the conductor layer having a bottom surface facing toward the first surface of the substrate, a top surface opposite to the bottom surface, and an end face coupling the bottom and top surfaces to each other; and a terminal electrode connected to the conductor layer, wherein: the terminal electrode touches part of the end face of the conductor layer and part of the top surface of the conductor layer contiguous to the end face; and the protection film has a concave portion having a shape that is recessed inward from an edge of the protection film except a portion thereof corresponding to the concave portion, the concave portion exposing the part of the top surface of the conductor layer that touches the terminal electrode, and accommodating part of the terminal electrode.