Patent ID: 11899240
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 0:
1. A method for forming a photonic device, the method comprising:
providing a substrate;
forming a first insulator layer over the substrate;
depositing a first plurality of waveguide layers and a first plurality of insulator spacers at different vertical levels over the first insulator layer, wherein adjacent waveguide layers in the first plurality of waveguide layers are isolated by one or more insulator spacers in the first plurality of insulator spacers;
forming a first plurality of waveguide patterns at the first plurality of waveguide layers, wherein at least two waveguide patterns at different vertical levels in the first plurality of waveguide patterns are coupled;
removing the substrate;
forming a second insulator layer over the first plurality of waveguide patterns;
forming a handling wafer over the second insulator layer;
depositing a second plurality of waveguide layers and a second plurality of insulator spacers at different vertical levels under the first insulator layer, wherein adjacent waveguide layers in the second plurality of waveguide layers are isolated by one or more insulator spacers in the second plurality of insulator spacers; and
forming a second plurality of waveguide patterns at the second plurality of waveguide layers, wherein at least two waveguide patterns at different vertical levels in the second plurality of waveguide patterns are coupled.