Patent ID: 11916091
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A device comprising:
a substrate, the substrate having a first side and a second side opposite to the first side;
a plurality of photosensitive regions in the substrate;
an interconnect structure on the first side of the substrate;
a plurality of recesses on the second side of the substrate, the plurality of recesses extending into a semiconductor material of the substrate;
an anti-reflective layer extending along sidewalls of the plurality of recesses;
a metal grid over the anti-reflective layer; and
a metal shield over the anti-reflective layer and adjacent to the metal grid, wherein a portion of the metal shield extends through the anti-reflective layer and physically contacts the semiconductor material of the substrate, and wherein a top surface of the metal shield is substantially level with a top surface of the metal grid.