US 11,776,984 B2
Image sensor comprising an angular filter
Benjamin Bouthinon, Grenoble (FR)
Assigned to ISORG, Limoges (FR)
Appl. No. 17/440,001
Filed by ISORG, Limoges (FR)
PCT Filed Feb. 20, 2020, PCT No. PCT/FR2020/050317
§ 371(c)(1), (2) Date Sep. 16, 2021,
PCT Pub. No. WO2020/193889, PCT Pub. Date Oct. 1, 2020.
Claims priority of application No. 19/02965 (FR), filed on Mar. 22, 2019.
Prior Publication US 2022/0173153 A1, Jun. 2, 2022
Int. Cl. H01L 27/146 (2006.01); G02B 5/00 (2006.01); H10K 30/30 (2023.01)
CPC H01L 27/14643 (2013.01) [G02B 5/003 (2013.01); H10K 30/30 (2023.02)] 20 Claims
OG exemplary drawing
 
1. An image sensor comprising:
organic photodetectors;
an angular filter less than 20 μm away from the photodetectors; and
a surface intended to receive a radiation, said photodetectors being configured to detect said radiation, the angular filter covering the organic photodetectors and being configured to block the rays of said radiation having an incidence relative to a direction orthogonal to the surface greater than a threshold and to give way to rays of said radiation having an incidence relative to a direction orthogonal to the surface smaller than the threshold,
wherein the angular filter comprises a layer opaque to said radiation and an array of openings formed in the layer, the openings being filled with air or with a material at least partially transparent to said radiation, and
wherein the openings are arranged in rows and in columns, a pitch between adjacent openings of a same row or of a same column varying from 10 μm to 60 μm.