Patent ID: 11948957
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 19:
20. An image sensor comprising:
a substrate having a first pixel region, a second pixel region separated from the first pixel region in a first horizontal direction, a third pixel region separated from the first pixel region in a second horizontal direction that crosses the first horizontal direction, and a fourth pixel region separated from the second pixel region in the second horizontal direction and separated from the third pixel region in the first horizontal direction;
a pixel separation structure configured to define the first to fourth pixel regions;
first to fourth photoelectric conversion regions respectively disposed within the first to fourth pixel regions; and
a device isolation layer configured to define first to fourth patterns in the first to fourth pixel regions, respectively,
wherein, in a plan view, each of the first to fourth patterns comprises a first corner, a second corner separated from the first corner in the first horizontal direction, a third corner separated from the first corner in the second horizontal direction, and a fourth corner separated from the second corner in the second horizontal direction and separated from the third corner in the first horizontal direction,
wherein a radius of curvature of the second corner of the first pattern and a radius of curvature of the third corner of the first pattern are less than a radius of curvature of the first corner of the first pattern and a radius of curvature of the fourth corner of the first pattern,
wherein a radius of curvature of the first corner of the second pattern and a radius of curvature of the fourth corner of the second pattern are less than a radius of curvature of the second corner of the second pattern and a radius of curvature of the third corner of the second pattern,
wherein a radius of curvature of the first corner of the third pattern and a radius of curvature of the fourth corner of the third pattern are less than a radius of curvature of the second corner of the third pattern and a radius of curvature of the third corner of the third pattern,
wherein a radius of curvature of the second corner of the fourth pattern and a radius of curvature of the third corner of the fourth pattern are less than a radius of curvature of the first corner of the fourth pattern and a radius of curvature of the fourth corner of the fourth pattern.