Patent ID: 11860414
Assignee: GLOBALFOUNDRIES U.S. INC.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 12:
13. A method of forming a structure for an edge coupler, the method comprising:
forming a waveguide core region on a first dielectric layer, wherein the waveguide core region has a tapered section with an end surface that terminates adjacent to an edge of the first dielectric layer;
forming a second dielectric layer on the waveguide core region and the first dielectric layer; and
forming a first trench and a second trench in the second dielectric layer that are each positioned adjacent to the tapered section of the waveguide core region,
wherein the first dielectric layer is positioned on a substrate, the substrate includes a groove that is positioned beneath the waveguide core region, and the first dielectric layer includes a portion that is positioned between the groove and the waveguide core region.