Patent ID: 11961854
Assignee: nan
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 9:
10. A semiconductor device, comprising:
a semiconductor substrate, comprising a first type semiconductor layer and a second type semiconductor layer, wherein the first type semiconductor layer has a top surface and a bottom surface, the bottom surface of the first type semiconductor layer has a convexity or a concavity, the top surface of the first type semiconductor layer is protruded according to the convexity or recessed according to the concavity, the second type semiconductor layer is disposed on the top surface of the first type semiconductor layer, and a top surface and a bottom surface of the second type semiconductor layer are protruded according to the convexity or recessed according to the concavity, and wherein:
the semiconductor device is an image sensor that comprises a photodiode comprising the first type semiconductor layer and the second type semiconductor layer.