Patent ID: 11973101
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 15:
16. An image-sensor device, comprising:
a semiconductor substrate having a first side and a second side opposite to the first side;
a radiation-sensing region in the semiconductor substrate;
an isolation structure extending from the second side towards the first side, wherein the isolation structure comprises a first dielectric layer and a second dielectric layer, the first dielectric layer at least partially surrounds the second dielectric layer, the first dielectric layer has a greater dielectric constant than that of the second dielectric layer, and at least a portion of the first dielectric layer is in direct contact with the semiconductor substrate; and
a grid, wherein the second side of the semiconductor substrate is between the grid and the first side of the semiconductor substrate.