Patent ID: 11935830
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. A method, comprising:
forming a first active diffusion (AD) region in a backside of a substrate;
forming a second AD region in the backside of the substrate and adjacent the first AD region;
forming a device in the substrate;
forming a frontside conductive layer over a frontside of the substrate and electrically connecting the frontside conductive layer to the device;
forming a first backside conductive layer over the backside of the substrate that includes a first plurality of conductive segments; and
forming a second backside conductive layer over the first backside conductive layer that includes a second plurality of conductive segments, wherein:
the second plurality of conductive segments are configured to transmit power signals; and
the first and the second conductive segments cover the first AD region from directly above the second backside conductive layer and define an opening directly above the second AD region such that the second AD region is exposed and detectable with at least one of a laser, an emission microscopy, or an electron beam from above the second backside conductive layer.