Patent ID: 8680882

Claim:
An interposer for a three-dimensional integrated circuit comprising: a substrate portion provided with a plurality of through substrate vias and having a front surface and a back surface; a front-side interconnection wiring layers formed on the front surface of the substrate portion, wherein the front-side interconnection wiring layers comprising: a plurality of functional metal wiring segments; and an array of μBump pads provided on the top surface of the front-side interconnection wiring layers, wherein each of the functional metal wiring segments connecting two μBump pads; a plurality of dummy metal wiring segments connecting two or more of the plurality of functional metal wiring segments in series into a chain and the chain terminating in at least two terminal-end μBump pads; and at least one sacrificial probe pad connected to each of the two terminal-end μBump pads; wherein each of the plurality of dummy metal wiring segments in the chain is provided with a laser fuse portion for disconnecting the dummy metal wiring segment.