Patent ID: 8895360

Claim:
A method to fabricate a stacked semiconductor device, the method comprising: providing a first substrate having a first electrical device and a first bond pad over the first electrical device, the first electrical device being electrically connected to the first bond pad; providing a second substrate having a second electrical device and a second bond pad over the second electrical device, the second electrical device being electrically connected to the second bond pad; bonding the first and second substrates together, wherein the first and second bond pads are electrically interconnected; and after the bonding, forming a through-substrate-via (“TSV”) from a surface of the first substrate opposite the first bond pad, through the first substrate, and to the first bond pad, wherein forming the TSV includes forming a trench extending from the surface of the first substrate opposite the first bond pad, through the first substrate, and to the first bond pad and depositing a metal material within the trench after bonding the first and second substrates together.