Patent ID: 11869991
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC H

Claim 16:
17. A semiconductor device, comprising:
a waveguide over a first dielectric layer, wherein:
a first portion of the waveguide has a constant first width;
a second portion of the waveguide has a constant second width larger than the constant first width;
the constant second width is at least three times larger than the constant first width;
a third portion of the waveguide extends from the first portion of the waveguide to the second portion of the waveguide;
the third portion of the waveguide has a first tapered sidewall extending from a first side of the third portion of the waveguide to a second side of the third portion of the waveguide; and
the first side of the third portion of the waveguide is adjacent the first portion of the waveguide and the second side of the third portion of the waveguide is adjacent the second portion of the waveguide;

an n-doped semiconductor structure; and
a p-doped semiconductor structure, wherein the second portion of the waveguide is between the n-doped semiconductor structure and the p-doped semiconductor structure.