Patent ID: 7977781

Claim:
A semiconductor device comprising: a package board; a first LSI connected to the package board including an external I/O interface for performing communication via the package board; a second LSI provided above the first LSI including a first memory device having a plurality of first memory cells; a third LSI provided above the first LSI including a first processing unit for performing operations; a fourth LSI provided above the second LSI and above the third LSI including a second memory device having a plurality of second memory cells; a fifth LSI provided above the second LSI and the third LSI including a second processing unit for performing operations; a first through via provided so as to pass through the first LSI, the second LSI, the third LSI, the fourth LSI, and the fifth LSI, so as to connect to the first processing unit and the second processing unit, and so as not to connect to the first memory device and the second memory device.