Patent ID: 7148715

Claim:
A method for testing a plurality of microelectronic dies, comprising: providing a microfeature workpiece including a substrate having a front side, a backside, and a plurality of microelectronic dies, the individual dies comprising (a) an integrated circuit, (b) a plurality of contact pads at the backside of the substrate operatively coupled to the integrated circuit, (c) an image sensor at the front side of the substrate and electrically coupled to the integrated circuit, and (d) a plurality of terminals at the front side of the substrate and electrically coupled to the integrated circuit, and wherein interconnects extend through the substrate electrically coupling the terminals to corresponding contact pads; forming a redistribution assembly at the backside of the substrate, the redistribution assembly having a dielectric layer over the backside of the substrate, a plurality of ball-pads, and traces electrically coupling the ball-pads to corresponding contact pads; contacting individual contact pads with corresponding pins of a probe card; contacting the individual ball-pads with corresponding pins of the probe card; testing the dies; and illuminating the image sensors while testing the dies.