Patent ID: 11908878
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 16:
17. An image sensor, comprising:
a pixel in a substrate, the pixel comprising a photosensitive region and a circuitry region next to the photosensitive region;
a plurality of doped isolations disposed in the substrate at a first side and an interconnect disposed over the first side of the substrate;
an isolation structure disposed at a second side of the substrate opposite to the first side, the isolation structure comprising a first dielectric structure and a conductive grid on the first dielectric structure filling in a grid mesh cavity over the circuitry region and surrounding the photosensitive region; and
a plurality of conductive structures disposed next to the isolation structure in a plurality of openings at the second side of the substrate, wherein the conductive structures are electrically connected to the conductive grid of the isolation structure, and the isolation structure is electrically isolated from the pixel,
wherein the conductive structures are in contact with the doped isolations for electrically connecting the interconnect and the conductive grid through the doped isolations.