US 12,249,613 B2
Image sensing device
Dong Ha Kim, Icheon-si (KR)
Assigned to SK HYNIX INC., Icheon-si (KR)
Filed by SK hynix Inc., Icheon-si (KR)
Filed on Jul. 28, 2021, as Appl. No. 17/387,272.
Claims priority of application No. 10-2020-0175696 (KR), filed on Dec. 15, 2020.
Prior Publication US 2022/0190020 A1, Jun. 16, 2022
Int. Cl. H01L 27/146 (2006.01)
CPC H01L 27/14623 (2013.01) [H01L 27/14629 (2013.01); H01L 27/14621 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An image sensing device comprising:
one or more first unit pixels, each first unit pixel structured to generate a pixel signal by converting filtered light incident through a first color filter;
a plurality of second unit pixels positioned adjacent to the one or more first unit pixels, each second unit pixel structured to generate a pixel signal by converting filtered light incident through a second color filter;
a first grid including a light absorption layer positioned between the first and second color filters and a first capping layer covering the light absorption layer; and
a second grid including an air layer positioned between adjacent second color filters and a second capping layer covering the air layer,
wherein the second capping layer extends to bottoms of the first and second color filters.