Patent ID: 11862562
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. A circuit structure, comprising:
a substrate;
a first transistor stack over the substrate, the first transistor stack comprising:
a first transistor over the substrate; and
a second transistor above the first transistor;

a second transistor stack over the substrate and abutting the first transistor stack, the second transistor stack comprising:
a third transistor over the substrate, wherein the first and third transistors are of a first conductivity type; and
a fourth transistor above the third transistor, wherein the second and fourth transistors are of a second conductivity type different from the first conductivity type;

a first metal layer above the first transistor stack and the second transistor stack, the first metal layer comprising:
a set of first conductive lines over the first transistor stack, and
a set of second conductive lines over the second transistor stack, wherein a configuration of the set of first conductive lines is different from a configuration of the set of second conductive lines; and

a second metal layer below the substrate, the second metal layer comprising:
a set of third conductive lines under the first transistor stack, and
a set of fourth conductive lines under the second transistor stack, wherein a configuration of the set of third conductive lines is the same as a configuration of the set of fourth conductive lines.