Patent ID: 7517798
Filing Date: 2009-04-14
Classification: H01L,H05K

Abstract:
1. A method for forming a through-wafer interconnect in a substrate, the method comprising: providing a substrate having a conductive pad on a surface of the substrate; depositing a passivation layer over the conductive pad and the surface of the substrate; forming a blind aperture through the passivation layer, the conductive pad and into the substrate using a substantially continual process; depositing a dielectric layer over the passivation layer and an inner surface of the blind aperture; depositing a conductive layer over the dielectric layer and the inner surface of the blind aperture; removing the conductive layer disposed over the passivation layer while leaving the conductive layer disposed over the inner surface of the blind aperture; removing at least a portion of the dielectric layer disposed over the conductive pad; removing at least a portion of the passivation layer disposed over the conductive pad, the removing including: filling the blind aperture with a conductive material and covering an exposed portion of the conductive pad with the conductive material.