Patent ID: 7989960
Filing Date: 2011-08-02
Classification: G06F,G11C,H01L

Abstract:
1. A semiconductor device comprising: a wiring board having a main surface and a rear surface and external connecting terminals formed on the rear surface; a memory chip mounted on the main surface of the wiring board; a controller chip mounted on the memory chip and controlling the memory chip; and an interposer mounted on the memory chip and electrically connected to the controller chip, wherein first terminals are formed on a first side of the memory chip, the interposer is disposed between the first side of the memory chip and the controller chip, second terminals are formed on a first side of the interposer, third terminals are formed on a second side perpendicular to the first side and fourth terminals are formed on a third side opposed to the first side, the second terminals formed on the first side of the interposer are electrically connected to the first terminals formed on the first side of the memory chip, the third terminals formed on the second side of the interposer are electrically connected to the external connecting terminals through fifth terminals provided on one side of the main surface of the wiring board, and the fourth terminals formed on the third side of the interposer are electrically connected to the controller chip.