Patent ID: 8053278

Claim:
A method for manufacturing a multi-chip package type semiconductor device, comprising: mounting a first semiconductor chip on a surface of a substrate, wherein a first pad is formed on a surface of the first semiconductor chip, the first pad having a first area and a second area, the second area being different from the first area; mounting a second semiconductor chip on the surface of the first semiconductor chip, wherein a second pad is formed on the second semiconductor chip and wherein the second pad is located above the first pad, a third pad is formed on the surface of the substrate, and the first pad is located above the third pad; forming a first metal bump on the first pad in the first area; forming a second metal bump on the second pad; connecting the first pad and the second pad with a first bonding wire having a ball-shaped first end and a second end, wherein the ball-shaped first end of the first bonding wire is first connected to the first pad in the second area by a ball bonding, and then the second end of the first bonding wire is connected to the second metal bump formed on the second pad; connecting the first pad and the third pad with a second bonding wire having a ball-shaped first end and a second end, wherein the ball-shaped first end of the second bonding wire is first connected to the third pad by a ball bonding, and then the second end of the second bonding wire is connected to the first metal bump formed on the first pad in the first area; and sealing the first and second semiconductor chips, the surface of the substrate and the first and second bonding wires with a resin.