Patent ID: 8334599

Claim:
An electronic device, comprising: a stack of a plurality of semiconductor chips arranged one on top of another, the stack comprising: a first semiconductor chip of the plurality of semiconductor chips arranged at a bottom of the stack, the first semiconductor chip comprising a first internal pad electrically connected to a first electronic circuit in the first semiconductor chip, the first internal pad configured to receive an electronic signal from an external electronic circuit; a second semiconductor chip of the plurality of semiconductor chips disposed in the stack above the first semiconductor chip, the second semiconductor chip comprising a second internal pad connected to a second electronic circuit in the second semiconductor chip; a redistribution layer arranged on the second semiconductor chip, the redistribution layer comprising a contact pad and an insulator layer, wherein a first portion of the contact pad is disposed on a front side of the insulator layer facing the first semiconductor chip and a second portion of the contact pad is disposed in an opening of the insulator layer; and a first Through Silicon Via directly connected to the first internal pad, the first Through Silicon Via and contact pad electrically coupling the first and second internal pads.