Patent ID: 11948964
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 2:
3. The image sensor of claim 1, wherein each of the second unit pixel, the third unit pixel and the fourth unit pixel comprises:
a second photodiode (PD) formed in the semiconductor substrate;
a fourth pillar, a fifth pillar and a sixth pillar of the plurality of pillars; and
a third gate structure, a fourth gate structure and a fifth gate structure of the plurality of gate structures,
wherein each of the fourth pillar, the fifth pillar and the sixth pillar comprises a second channel region and a second drain region on the second channel region,
wherein the third gate structure comprises a third gate electrode surrounding a sidewall of the second channel region of the fourth pillar and a third gate dielectric layer between the third gate electrode and the second channel region of the fourth pillar,
wherein the fourth gate structure comprises a fourth gate electrode surrounding a sidewall of the second channel region of the fifth pillar and a fourth gate dielectric layer between the fourth gate electrode and the second channel region of the fifth pillar, and
wherein the fifth gate structure comprises a fifth gate electrode surrounding a sidewall of the second channel region of the sixth pillar and a fifth gate dielectric layer between the fifth gate electrode and the second channel region of the sixth pillar.