Patent ID: 8222749

Claim:
A wiring substrate, comprising: a plurality of connection pads and leading wiring portions connected to said plurality of connection pads respectively, arranged on an upper surface of an insulating layer, wherein the leading wiring portions are arranged to be bended, and wherein the connection pads are located from or at a bending portion of the leading wiring portions such that the connection pads have a width x that is substantially at most a width y of the corresponding leading wiring portion thickened by a length z corresponding to a bending angle θ of the bending portion, such that y+z=x=y/cos θ; wherein a side of the connection pads adjacent to the lead wiring portions forms a side opposing a right angle part of a rectangular triangle for defining the cos θ, and a length of the side opposing the right angle part is equal to the width x of the connection pad, and a length of a side of said rectangular triangle that extends between the θ angle and the right angle is equal to the width y of the leading wiring portion; and a solder layer is provided on the connection pads and protrudes upward from an upper surface of the connection pads.