Patent ID: 7973401

Claim:
A chip package comprising: a substrate; a first wirebonded wire having a first end contacting a first contact pad of said substrate at a first side of said substrate; a first semiconductor chip over said first side of said substrate, wherein said first semiconductor chip has a first side facing said first side of said substrate, wherein said first semiconductor chip comprises a second contact pad at said first side of said first semiconductor chip, wherein said second contact pad is connected to a third contact pad of said substrate; and a second semiconductor chip over a second side of said first semiconductor chip, wherein said second semiconductor chip has a first side facing said second side of said first semiconductor chip, wherein said second side of said first semiconductor chip is opposite to said first side of said first semiconductor chip, wherein said second semiconductor chip comprises a passivation layer at a second side of said second semiconductor chip, a fourth contact pad having a first contact point at a bottom of an opening in said passivation layer, and a metal layer over said passivation layer and on said first contact point, wherein said second side of said second semiconductor chip is opposite to said first side of said second semiconductor chip, wherein said passivation layer comprises a nitride layer, wherein said first wirebonded wire has a second end contacting a second contact point of said metal layer, wherein said second contact point is connected to said first contact point through said opening in said passivation layer, wherein said second contact point is not vertically over said first contact point, wherein said second semiconductor chip has a first edge, a second edge opposite to said first edge, and a center point between said first and second edges, wherein a horizontal distance between said second contact point and said first edge is less than that between said first contact point and said first edge, and a horizontal distance between said first contact point and said center point is less than that between said first contact point and said first edge, wherein said first wirebonded wire extends across said first edge.