Patent ID: 11960122
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Optics (Instruments)
Classification: CPC G | IPC G

Claim 17:
18. A method for fabricating a semiconductor device, comprising:
providing a substrate layer;
forming a first oxide layer over the substrate layer;
forming a waveguiding layer for waveguiding a light beam transmitted in the waveguiding layer over the first oxide layer, wherein a grating coupler is disposed over the waveguiding layer;
forming a second oxide layer transparent to the light beam with a target wavelength over the waveguiding layer;
forming a semiconductor layer transparent to the light beam over the second oxide layer, wherein the second oxide layer is underneath the semiconductor layer and adjacent to a surface of the semiconductor layer; and
forming a lens disposed within a silicon portion of the semiconductor layer and adjacent to another surface of the semiconductor layer, wherein the lens comprises a plurality of anti-reflective coating (ARC) layers formed above a curved surface and is configured to receive, from one of the grating coupler or a light-guiding element, the light beam, and focus the light beam towards another one of the light-guiding element or the grating coupler.