Patent ID: 8519538

Claim:
A method of fabricating a semiconductor device, the method comprising: providing a substrate having a frontside and a backside; providing a layer above the frontside of the substrate, the layer having a different composition from the substrate and containing a first electrical element; controlling a laser power and a laser pulse number to laser etch an opening through the layer and at least a portion of the frontside of the substrate; completely filling the opening with a conductive material to form a via; forming a passivation layer over the frontside of the substrate, the passivation layer containing electrical interconnection component that electrically couples the first electrical element to the via; bonding a carrier substrate to the substrate, the passivation layer being disposed between the substrate and the carrier substrate; removing, after bonding the carrier substrate, a portion of the backside of the substrate to expose the via; thereafter removing the carrier substrate; and electrically coupling the first electrical element to a second element on the backside through the via.