Patent ID: 11948886
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 11:
12. A semiconductor device, comprising:
a semiconductor substrate including one or more active semiconductor components, wherein a front side is defined over the semiconductor substrate and a back side is defined beneath the semiconductor substrate; and
a first back side power rail, a second back side power rail, a third back side power rail and a fourth back side power rail in a first back side metal layer at the back side of the semiconductor substrate and each extending in a first direction; and
wherein:
the first back side power rail is configured to receive a first reference power voltage;
the second back side power rail is configured to receive a second reference power voltage;
each of the third and fourth back side power rails is configured to receive a third reference power voltage;
within a span of a first cell that is defined relative to the first direction,
the second back side power rail is between the third and fourth back side power rails relative to the first direction; and

the first reference power voltage, the second reference power voltage, and the third reference power voltage are different from each other.