Patent ID: 11915966
Assignee: INTERNATIONAL BUSINESS MACHINES CORPORATION
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A semiconductor device comprising:
a first substrate;
a second substrate;
a SiGe layer provided between the first substrate and the second substrate;
a buried power rail (BPR) extending through the first substrate and the SiGe layer, a bottom portion of the BPR having portions extending laterally therefrom in the SiGe layer and having a width greater than a width of a top portion of the BPR; and
a nano though-silicon via formed in the second substrate in contact with the BPR,
wherein a width of the bottom portion of the BPR is greater than a width of the nano through-silicon via in contact therewith, and
wherein a thickness of the bottom portion of the BPR is less than a width of the top portion of the BPR.