Patent ID: 7323788

Claim:
A semiconductor device comprising: a wiring substrate having a first main surface with a generally central chip mounting area, a first back surface, a plurality of ring-shaped first bonding electrodes formed in a first area and surrounding said chip mounting area, a plurality of second bonding electrodes formed in a second area surrounding said first area, and wiring formed within said wiring substrate and electrically connecting said first bonding electrodes with said second bonding electrodes; a semiconductor chip having a second main surface and a second back surface, wherein said second back surface is so mounted over said wiring board as to face said chip mounting area, and a plurality of third electrodes are arranged over said second main surface; and a plurality of wires electrically connecting said third electrodes to respective predetermined electrodes among said first bonding electrodes and said second bonding electrodes, wherein each said first bonding electrode is electrically connected to a power supply potential or a reference potential, wherein said second bonding electrodes are used for inputting or outputting signals, wherein said plurality of third electrodes are arranged in a plurality of rows along a perimeter of said second main surface, and the third electrodes included in a first row and the third electrodes included in a second row positioned inwardly of said first row from said perimeter are arranged in a zigzag pattern in a direction along said perimeter, wherein said plurality of third electrodes include a first group of electrodes electrically connected to said first bonding electrodes and a second group of electrodes electrically connected to said second bonding electrodes, and wherein, of said plurality of wires, a group of first wires electrically connecting said first bonding electrodes with said first group of electrodes are of diameter not smaller than a group of second wires electrically connecting said second bonding electrodes and said second group of electrodes.