Patent ID: 11968848
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. An image sensor comprising:
a first light sensing cell configured to sense first light of an incident light and generate a first electrical signal based on the sensed first light;
a second light sensing cell configured to sense second light of the incident light and generate a second electrical signal based on the sensed second light;
a light sensing layer extending from a first region on the first light sensing cell to a second region on the second light sensing cell;
a first color filter provided between the first light sensing cell and the light sensing layer;
a second color filter provided on the second light sensing cell and the light sensing layer; and
a through-channel extending along a direction intersecting the extending direction of the light sensing layer, and electrical connected to the light sensing layer,
wherein each of the first and second color filters comprises:
a nanostructure comprising a plurality of structures made of a first material having a first refractive index, and a second material having a second refractive index different from the first refractive index, each of the plurality of structures arranged in a first direction parallel to an upper surface of the first color filter,
a first substrate disposed on the light sensing layer and made of a material having a third refractive index lower than the first refractive index, the plurality of structures being disposed on the first substrate, and
a second substrate disposed between the plurality of structures and the light sensing layer and made of a material having a fourth refractive index lower than the first refractive index,
wherein the plurality of structures comprise a plurality of through-holes formed between the first substrate and the second substrate and filled with the second material, the second refractive index of the second material being lower than the first refractive index of the first material.