Patent ID: 11894471
Assignee: PHOGRAIN TECHNOLOGY (SHENZHEN) CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 5:
6. The chip according to claim 4, wherein cross sections of the first electrode and the photosensitive area in a direction parallel with the surface of the chip are both annular, and the light-splitting groove and the light-entering anti-reflection coating are both circular;
the light-splitting groove, the first electrode, the photosensitive area and the light-entering anti-reflection coating are all concentric circles, each with a circle center alignment error being less than 20 μm;
the light-splitting groove has a diameter of 50 μm-250 μm;
the first electrode has an inner diameter not less than the diameter of the light-splitting groove, and the first electrode has an outer diameter greater than the diameter of the light-splitting groove and is 60 μm-1000 μm; and
the photosensitive area has an inner diameter not less than the diameter of the light-splitting groove, and the photosensitive area has an outer diameter not greater than the diameter of the light-entering anti-reflection coating.