Patent ID: 9635762
Date: 2017-04-25
CPC Classifications: H01L,H05K

Claim:
1. A stacked semiconductor package, comprising: a first semiconductor package including a first circuit board and a first semiconductor device mounted on the first circuit board; a second semiconductor package including a second circuit board and a second semiconductor device mounted on the second circuit board, the second semiconductor package being stacked on the first semiconductor package; and a heat transfer layer provided over the first semiconductor device and a part of the first circuit board, the part being around the first semiconductor device, wherein the first circuit board includes a thermal via extending through the first circuit board, the heat transfer layer is in contact with the first semiconductor device and the first circuit board, and is connected to the thermal via, the heat transfer layer includes a first heat transfer layer and a second heat transfer layer, and the second heat transfer layer having a thermal conductivity lower than the thermal conductivity in the thickness direction of the first heat transfer layer and having a heat-insulating property.