Patent ID: 8058708

Claim:
A through-hole interconnection structure for a semiconductor wafer which includes a plurality of wafers bonded together, each of the plurality of wafers including a substrate with a device formed thereon, wherein: the semiconductor wafer comprises at least a first wafer and a second wafer electrically connected to the first wafer; a through-hole separating section penetrating through the substrate of the first wafer, said through-hole separating section includes an interior space; an electrical signal connecting section of the second wafer is provided to protrude from a bonding surface of the second wafer, the bonding surface being bonded with the first wafer; and the electrical signal connecting section extending through the through-hole separating-section, said electrical signal connecting section having a cross section with a curved line or two or more straight lines extending in different directions when the second wafer is seen along a cross section parallel to the bonding surface wherein the curved line or two or more straight lines are spaced a predetermined interval within the interior space of said through-hole separating section; wherein the interior space of said through-hole separating section is filled with the substrate of the first wafer which divides the electrical signal connecting section and the through-hole separating section.