Patent ID: 11960116
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 15:
16. A photoelectric integrated circuit (IC) die, comprising:
a semiconductor substrate;
a first dielectric layer disposed on the semiconductor substrate;
a device layer disposed on the dielectric layer, the device layer comprising;
a first waveguide, disposed over the first dielectric layer and comprising a first strip portion and a first tapered tip portion, wherein the first strip portion is connected between the optical device and the first tapered tip portion; and
a second waveguide, disposed over the first dielectric layer and comprising a second strip portion and a second tapered tip portion connected to the second strip portion, wherein the second tapered tip portion of the second waveguide is optically coupled to the first tapered tip portion of the first waveguide, the second tapered tip portion of the second waveguide is separated from the first tapered tip portion of the first waveguide by a distance, and a center axis of the first strip portion of the first waveguide is offset from a center axis of the second strip portion of the second waveguide, and
a second dielectric layer disposed on the first dielectric layer to cover the first waveguide and the second waveguide, wherein sidewalls of the first dielectric layer and sidewalls of the second dielectric layer are substantially aligned with sidewalls of the semiconductor substrate;

wherein the first tapered tip portion has a first sidewall and a second sidewall opposite to the first sidewall, the first sidewall of the first tapered tip portion is parallel to the center axis of the first strip portion, and the second sidewall of the first tapered tip portion is inclined with respect to the center axis of the first strip portion.