Patent ID: 11876110
Assignee: OMNIVISION TECHNOLOGIES, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 8:
9. The image sensor of claim 1, wherein the concentration of Ge of the SiGe material:
gradually increases from zero to a first concentration at a third depth located between the non-illuminated surface of the semiconductor material and a first depth, wherein the first concentration ranges from 10% to 20%;
gradually increases from the first concentration at the third depth to a maximum concentration at the first depth within the SiGe material, wherein the maximum concentration is greater than the first concentration; and
gradually decreases from the maximum concentration at the first depth to zero at a second depth that is located an interface between the SiGe material and a second silicon material of the semiconductor material that is disposed between the SiGe material and the illuminated surface of the semiconductor material.