Patent ID: 11942423
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. A method comprising:
forming a first wiring structure residing on a first wiring level;
forming a second wiring structure residing on a second wiring level, wherein a bottom portion of the second wiring structure is directly connected in series to a top portion of the first wiring structure;
forming a third wiring structure residing on a third wiring level and being overlapped with and connected in series to the second wiring structure; and
forming a tapered via between the third wiring structure residing on the third wiring level and the second wiring structure on the second wiring level, such that the tapered via directly connects a bottom portion of the third wiring structure to a top portion of the second wiring structure, wherein:
the first wiring structure, the second wiring structure and the third wiring structure being formed as a spiral inductor spanning over the first wiring level, the second wiring level and the third wiring level, and
the second wiring structure formed at least partially residing outside a boundary of the first wiring structure and the third wiring structure formed at least partially residing outside a boundary of the second wiring structure.