Patent ID: 8284564

Claim:
A circuit board comprising: a plurality of balls functioning as electrodes aligned in a grid; a power supply wiring pattern area connected to power supply terminals of an integrated circuit mounted thereon; and a feeding pattern area connected to a feeding point; wherein the plurality of balls at least includes a first power supply ball group and a second power supply ball group connected respectively to first and second power supply terminal arrays, aligned at a predetermined interval, of the integrated circuit; the power supply wiring pattern area includes a first power supply connection pattern connected to the first power supply ball group, a second power supply connection pattern connected to the second power supply ball group, and at least one connection pattern connecting a first part of the first power supply connection pattern and a second part of the second power supply connection pattern and not in contact with the balls, wherein the first power supply connection pattern and the second power supply connection pattern are formed in parallel and the at least one connection pattern connects a first longitudinally central portion of the first power supply connection pattern and a second longitudinally central portion of the second power supply connection pattern; a first end portion of the first power supply connection pattern comprises a first connection portion connected to one end of the feeding pattern area, and a second connection portion to be connected to one electrode of a first bypass capacitor; a second end portion of the second power supply connection pattern comprises a third connection portion to be connected to one electrode of a second bypass capacitor.