Patent ID: 7453704
Filing Date: 2008-11-18
Classification: G06F,H01L,H05K,Y02P

Abstract:
1. A printed wiring board comprising: a main body including an obverse side with an obverse wiring layer, and a reverse side with a reverse wiring layer; first pads provided on the obverse side in a first region defined thereon, and to be connected to terminals arranged on a surface of a first semiconductor chip; second pads provided on the reverse side in a second region defined thereon and overlapping with the first region, and to be connected to terminals arranged on a surface of a second semiconductor chip; interlayer wiring electrically connecting those of the first pads, which are located in an overlapping region, to those of the second pads which are located in the overlapping region; and a first attachment hole formed in the main body, through which a first radiation mechanism provided on the first semiconductor chip is attached to the main body; a second attachment hole formed in the main body, through which a second radiation mechanism provided on the second semiconductor chip is attached to the main body; and a third attachment hole formed in the main body, through which the first and second radiation mechanisms are attached to the main body.