Patent ID: 8319932

Claim:
A wiring board comprising: a substrate; pads provided in a plurality of rows on the substrate; and connecting lines formed on the substrate and each connected to one of the pads, the pads arranged in the plurality of rows including: first-row pads connected to first connecting lines; and second-row pads connected to second connecting lines, the first connecting lines being longer than the second connecting lines, each of the first connecting lines being formed so as to be separated from a corresponding one of the second-row pads by at least an insulating layer, and so as to have a widthwise center in a lower region below the corresponding second-row pad, each of the first connecting lines having widthwise edges provided, in a plan view, beyond widthwise edges of a corresponding one of the second-row pads in a region in which the first connecting line overlaps with the corresponding second-row pad, wherein each pad of the first-row pads is shifted in a lateral direction relative to a corresponding pad in the second-row pads; a previous width of each of the first connecting lines expands to a subsequent width greater than a width of the corresponding second-row pad when the first connecting line overlaps with the corresponding second-row pad; the subsequent width of each of the first connecting lines shrinks back to substantially the previous width at a location where the first connecting line no longer overlaps with the corresponding second-row pad; and each of the first connecting lines is an integral component without comprising multiple components connected together.