Patent ID: 11948955
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 26:
27. An image sensor comprising:
a sensor substrate comprising a plurality of first photosensitive cells configured to sense light, a plurality of second photosensitive cells configure to sense light, a plurality of third photosensitive cells configure to sense light, and a plurality of fourth photosensitive cells configure to sense light; and
a color separating lens array comprising:
a plurality of first regions each comprising a first dielectric having a first refractive index and forming a first pattern, and a second dielectric having a second refractive index that is less than the first refractive index and filling spaces of the first pattern in the first dielectric, the plurality of first regions respectively corresponding to the plurality of first photosensitive cells,
a plurality of second regions each comprising the first dielectric having the first refractive index and forming a second pattern that is different from the first pattern and a second dielectric having the second refractive index that is less than the first refractive index and filling spaces of the second pattern in the first dielectric, the plurality of second regions respectively corresponding to the plurality of second photosensitive cells,
a plurality of third regions each comprising the first dielectric having the first refractive index and forming a third pattern that is different from the first pattern and the second pattern, and the second dielectric having the second refractive index that is less than the first refractive index and filling spaces of the third pattern, the plurality of third regions respectively corresponding to the plurality of third photosensitive cells, and
a plurality of fourth regions each comprising the first dielectric having the first refractive index and forming a fourth pattern that is different from the first pattern, the second pattern, and the third pattern, and the second dielectric having the second refractive index that is less than the first refractive index and filling spaces of the fourth pattern, the plurality of fourth regions respectively corresponding to the plurality of fourth photosensitive cells,

wherein the plurality of first regions and the plurality of second regions are configured to form a phase distribution below the plurality of first regions and the plurality of second regions, wherein light of a first wavelength and light of a second wavelength among incident light incident on the color separating lens array are branched into different directions and condensed on each of the plurality of first photosensitive cells and each of the second photosensitive cells, respectively, based on the phase distribution, and
wherein a shape of the first pattern in the plurality of first regions and a shape of the second pattern in the plurality of second regions are gradually changed from a center of the color separating lens array toward a peripheral portion of the color separating lens array, and
wherein the plurality of first regions, the plurality of second regions, the plurality of third regions, and the plurality of fourth regions are respectively provided along four quadrant surfaces.