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

Claim 0:
1. 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;
a doped isolation region in the semiconductor substrate, wherein the doped isolation region is adjacent to the radiation-sensing region, and the doped isolation region has a first end and a second end, and the first end is closer to the first side than the second end;
an isolation structure extending from the second side towards the first side, the second end of the doped isolation region is closer to the second side of the semiconductor substrate than a distal end of the isolation structure, and the first end of the doped isolation region and the distal end of the isolation structure are positioned at different height levels; and
a grid, wherein the second side of the semiconductor substrate is between the first side of the semiconductor substrate and the grid.