Patent ID: 11923466
Assignee: INNOLIGHT TECHNOLOGY (SUZHOU) LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 0:
1. A photodetector with an integrated reflective grating structure, comprising:
a substrate;
an active layer disposed on the substrate;
a grating structure disposed between the substrate and the active layer;
a first doped region formed by doping the substrate at a location near the grating structure; and
a second doped region formed by doping a portion of the active layer at a location away from the grating structure,
wherein the doping type of the second doped region is different from that of the first doped region,
the active layer is a germanium layer,
the grating structure is disposed on top of the first doped region and at the bottom of the active layer,
a portion of the active layer is higher than the grating structure, and
the active layer is an epitaxial layer epitaxially grown on the substrate with the grating structure formed on the substrate.