Patent ID: 8614513

Claim:
A semiconductor device comprising: a semiconductor chip; a wiring that is included in the semiconductor chip, the wiring having a first part and a second part joined at a coupling part, the coupling part being between the first part and the second part, the first part having a first width and a first length, the first width being shorter than the first length, the second part having a second width and a second length, the second width being shorter than the second length, the first width being different from the second width; the first part, the coupling part, and the second part forming a conformation selected from the group consisting of a substantially T-shaped conformation, a substantially L-shaped conformation, and a substantially cross-shaped conformation; a pad that is formed above the wiring and in a position overlapping the entire coupling part; a bump that is formed on the pad; a buffer layer that is formed in a position between the coupling part and the pad so as to cover the entire coupling part, a first surface of the buffer layer facing the wiring, the buffer layer being made of a conductive material, and at least three terminating edges of the second part of the wiring being within the buffer layer in plan view: a contact part that is disposed between and electrically coupling the wiring and the buffer layer, the contact part being disposed between the bump and the wiring, and disposed within the second part of the wiring in plan view; and inorganic insulating layers that include a first inorganic insulating layer and a second inorganic insulating layer, the first inorganic insulating layer being formed between the wiring and the buffer layer, and the second insulating inorganic layer being formed between the buffer layer and the pad, wherein: the buffer layer is made of a material other than resin and softer than the inorganic insulating layer, and the conformation is a planar conformation parallel to the first surface of the buffer layer.