Patent ID: 7656022

Claim:
A wiring board, comprising: an insulating film; a plurality of wires provided on one surface of the insulating film; and a plurality of through holes created in said insulating film, wherein a portion of each wire is exposed from the other surface of the insulating film through the corresponding through hole, the portions of the wires exposed through said through holes correspond to attaching portions for attaching conductive brazing material in a bump form thereto, the attaching portions comprise at least one first attaching portion disposed in a peripheral region of the insulating film and at least one second attaching portion disposed in an inward region of the insulating film, and an area of each of the at least one first attaching portion to which a conductive brazing material is attached and exposed is greater than an area of each of the at least one second attaching portion to which a conductive brazing material is attached and exposed, and wherein the at least one second attaching portion comprises a plurality of attaching portions which are disposed in a substantially rectangular region formed in the inward region of said insulating film, the plurality of wires in said insulating film extend across one side of said substantially rectangular region, the at least one first attaching portion comprises at least two rows of attaching portions which are disposed in the peripheral region of said insulating film and parallel to one another in a direction in which the wires in said insulating film extend, and the at least two rows of attaching portions are adjacent to four corners of said substantially rectangular region and surround said substantially rectangular region from the outside thereof.