Patent ID: 8436467

Claim:
A semiconductor chip comprising: an electrode pad portion 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 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 barrier metal layer has a circumferential end part thereof formed inward of the first opening in the first protection layer as seen in a plan view, 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 which has an opening width smaller than the first opening, wherein a rim part of the second protection layer defining the second opening has an inclined shape, wherein the bump electrode is bonded to the barrier metal layer so as to cover a side surface of the circumferential end part of the barrier metal layer, and an electrode pad side surface of the peripheral part of the barrier metal layer is formed of a curved surface having a center of curvature only on the electrode pad side as seen in a sectional view.