Patent ID: 6870248

Claim:
A semiconductor device, comprising: a board having a mounting surface and an opposite surface; a first semiconductor chip mounted on the mounting surface of the board, the first semiconductor chip having an active surface and an inactive surface disposed opposite the active surface, the first semiconductor chip being joined to the board in a state where the inactive surface thereof is facing to the board; a second semiconductor chip having an active surface and an inactive surface disposed opposite the active surface, the second semiconductor chip being joined to the first semiconductor chip in a state where the active surface of the second semiconductor chip is facing to the active surface of the first semiconductor chip; bonding wires connecting the active surface of the first semiconductor chip and the mounting surface of the board; and a protective resin, permanently joined to the mounting surface of the board, covering the bonding wires and sidewalls of the first and second semiconductor chips with the inactive surface of the second semiconductor chip exposed to the outside of the protective resin, the protective resin having an exposed upper top surface formed so as to be flush with the inactive surface of the second semiconductor chip, and an exposed side surface that is perpendicular to the exposed upper surface.