Patent ID: 8922010

Claim:
A semiconductor chip comprising: an electrode pad portion formed on a face of a substrate; a first protection layer including a first opening through which a top face of the electrode pad portion is exposed, the first protection layer disposed on the face of the substrate and overlapping part of the electrode pad portion; a barrier metal layer formed on the electrode pad portion; a bump electrode on the barrier metal layer; and a second protection layer covering a region on the first protection layer and a region on the electrode pad portion, wherein the first protection layer has a step part formed therein as a result of the first protection layer overlapping the part of the electrode pad portion, wherein the barrier metal layer has a circumferential end part thereof formed outward of the step part as seen in a plan view, wherein the bump electrode is bonded to the barrier metal layer, wherein the barrier metal layer is on the electrode pad portion with a peripheral part of the barrier metal layer located over the second protection layer, wherein the second protection layer has a second opening through which the top face of the electrode pad portion is exposed and that has an opening width smaller than the first opening, and wherein a rim part of the second protection layer defining the second opening has an inclined shape, an upper surface of the second protection layer has a curved surface along a lower surface of the barrier metal layer, and a center point of a curvature of the curved surface as seen in a sectional view is located on a first protection layer side of the curved surface.