Patent ID: 11923386
Assignee: TAIWAN SEMICONDUCTOR MANUFACTURING COMPANY LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 12:
13. A method for forming an integrated chip, the method comprising:
forming a first photodetector in a semiconductor substrate, the first photodetector having a first side and an opposing second side;
forming a second photodetector in the semiconductor substrate, the second photodetector having a third side facing the first side of the first photodetector and an opposing fourth side facing away from the first photodetector;
etching the semiconductor substrate to form a first diffuser and a second diffuser along a back-side of the semiconductor substrate, wherein the first diffuser is closer to the second side than the first side and the second diffuser is closer to the fourth side than the third side; and
forming a dielectric on the back-side of the semiconductor substrate and within both the first diffuser and the second diffuser.