Patent ID: 7164194

Claim:
A BGA type semiconductor device comprising: a substrate having a first surface and a second surface opposite the first surface, the first surface including a first region, a second region surrounding the first region, a third region surrounding the second region, and a fourth region surrounding the third region and extending to the end of the first surface; and a semiconductor chip having signal terminals, power supply terminals, and a ground terminal, and being disposed in the first region on the first surface of the substrate, wherein a ground electrode electrically connected to the ground terminal of the semiconductor chip, and first through holes electrically connected to the ground electrode, are formed in the first region on the first surface of the substrate, each of the first through holes being formed through the substrate to be electrically connected to first soldering pads which are formed on the second surface of the substrate to be opposite the first region on the first surface, power supply pads electrically connected to the power supply terminals of the semiconductor chip, and second through holes electrically connected to the power supply pads, are formed in the second region on the first surface of the substrate, the second through holes being formed through the substrate to be electrically connected to second soldering pads which are formed on the second surface of the substrate to be opposite the second region on the first surface, signal pads electrically connected to the signal terminals of the semiconductor chip, and first wiring patterns each electrically connected to one of the signal pads, are formed in the third region on the first surface of the substrate, the signal pads being located close to the second region, and the first wiring patterns being extended from the third region to the fourth region on the first surface of the substrate, third through holes are formed and electrically connected to the first wiring patterns in the fourth region on the first surface of the substrate, the third through holes being formed through the substrate to an area of the second surface of the substrate opposite to the fourth region of the first surface, second wiring patterns are formed on the second surface of the substrate, electrically connected to the third through holes in the area of the second surface of the substrate opposite to the fourth region of the first surface, and extended from the area of the second surface to another area of the second surface opposite to the third region of the first surface so as to be electrically connected to third soldering pads which are formed in the another area of the second surface of the substrate, and an internal pattern is formed between the first and second surfaces of the substrate to be extended along the first region through the fourth region of the first surface, and electrically connected to the first through holes but not to the through holes other than the first through holes.