Patent ID: 11901388
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 integrated chip comprising:
forming a first photodetector and a second photodetector neighboring in a first semiconductor substrate;
forming a first transfer transistor and a second transfer transistor on and partially defined by the first semiconductor substrate, wherein the first and second transfer transistors are respectively at and electrically coupled to the first and second photodetectors;
depositing a dielectric layer covering the first and second transfer transistors;
bonding a second semiconductor substrate to the first semiconductor substrate through the dielectric layer;
performing a first selective etch into the second semiconductor substrate to form a semiconductor mesa between and neighboring the first and second photodetectors; and
forming a readout transistor on and partially defined by the semiconductor mesa, wherein the readout transistor is electrically coupled to the first and second transfer transistors.