Patent ID: 7420281

Claim:
A semiconductor device comprising: a board; a first semiconductor chip having an external connection electrode connected with an external connection terminal for receiving a signal from outside of the semiconductor device, a first electrostatic discharge protection circuit connected with the external connection electrode, a first internal connection electrode connected with the external connection electrode through the first electrostatic discharge protection circuit, and a first internal circuit connected to the first internal connection electrode, the first semiconductor chip being mounted on the board; a bonding wire having an end connected with the first internal connection electrode; and a second semiconductor chip having a second internal connection electrode connected with another end of the bonding wire, a second internal circuit connected to the second internal connection electrode, and a second electrostatic discharge protection circuit connected with the second internal connection electrode, the second electrostatic discharge protection circuit having a smaller area size than the first electrostatic discharge protection circuit, and the second semiconductor chip being stacked on the first semiconductor chip so that a part of the second semiconductor chip overlaps the first semiconductor chip; wherein each of a size of the external connection electrode and a size of the second internal connection electrode is less than a size of the first internal connection electrode.