Patent ID: 11894401
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for forming an image sensor, comprising:
forming a first photodetector and a second photodetector in a substrate;
forming an isolation structure in the substrate between the first photodetector and the second photodetector; and
forming a readout transistor over the isolation structure, wherein the readout transistor comprises a first sidewall over the first photodetector and a second sidewall over the second photodetector, wherein a height of the readout transistor from the first sidewall to the second sidewall is constant; and
doping the substrate to form a floating diffusion node within the substrate and adjacent to the first photodetector, wherein a gate of the readout transistor is directly electrically coupled to the floating diffusion node.