Patent ID: 11947168
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A stacked edge coupler, comprising:
an insulator layer;
a first assisting waveguide on the insulator layer, the first assisting waveguide comprises an end surface;
a waveguide core over the first assisting waveguide, the waveguide core comprising a tapered section having an end surface, and the end surface of the tapered section of the waveguide core is substantially coplanar with the end surface of the first assisting waveguide; and
a back-end-of-line stack over the waveguide core, the back-end-of-line stack comprises:
a side edge;
a dielectric layer; and
a second assisting waveguide on the dielectric layer adjacent to the side edge, and the second assisting waveguide has an overlapping arrangement with the tapered section of the waveguide core.