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

Claim 4:
5. A device comprising:
a first substrate;
a plurality of photosensitive regions in the first substrate;
a first dielectric layer on a first side of the first substrate;
a plurality of protrusions on a second side of the first substrate, the plurality of protrusions comprising a semiconductor material of the first substrate, the second side of the first substrate being opposite to the first side of the first substrate;
a second dielectric layer on the second side of the first substrate, the second dielectric layer extending along sidewalls of the protrusions; and
a metal shield over the second dielectric layer, wherein a portion of the metal shield extends through the second dielectric layer to the first substrate.