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

Claim 8:
9. A method for forming an image sensor, comprising:
performing a doping process to form a first photodetector, a second photodetector, and a third photodetector within a substrate, wherein the third photodetector is diagonal to the second photodetector;
forming a first readout transistor on a front-side surface of the substrate, wherein the first readout transistor overlies the first photodetector and the second photodetector; and
forming a second readout transistor on the front-side surface over the third photodetector, wherein a first sidewall of the first readout transistor over the first photodetector is disposed along a first plane when viewed from a top view, wherein a sidewall of the second readout transistor over the third photodetector is substantially coplanar with the first plane, and wherein a top surface of the substrate is orthogonal to the first plane.