Patent ID: 9053991
Filing Date: 2015-06-09
Classification: H01L

Abstract:
1. A semiconductor chip comprising: an electrode pad portion on a face of a substrate; a first protection layer disposed on the face of the substrate and overlapping a peripheral portion of the electrode pad portion establishing a first opening through which a first top face portion 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; an insulating protection layer covering a region on the first protection layer and a region on the electrode pad portion such that a second opening exposing a second top face portion of the electrode pad portion is formed, the second opening being within the first opening and the second top face portion being within the first top face portion of the electrode pad portion; and a barrier metal layer disposed on the second top face portion of the electrode pad portion, the barrier metal layer further comprising a peripheral part of the barrier metal layer formed over the insulating protection layer such that an electrode pad side facing surface of the peripheral part of the barrier metal layer comprises a curved surface having a center of curvature only on the electrode pad side of the barrier metal layer as seen in a sectional view.