US 11,906,764 B2
Optical filters and image sensors and camera modules and electronic devices
Mi Jeong Kim, Hwaseong-si (KR); Jinyoung Hwang, Goyang-si (KR); Chung Kun Cho, Suwon-si (KR); and Hye Ran Kim, Hwaseong-si (KR)
Assigned to Samsung Electronics Co., Ltd., Gyeonggi-do (KR); and Industry-University Cooperation Foundation Korea Aerospace University, Gyeonggi-do (KR)
Filed by Samsung Electronics Co., Ltd., Suwon-si (KR); and Industry-University Cooperation Foundation Korea Aerospace University, Goyang-si (KR)
Filed on Apr. 7, 2021, as Appl. No. 17/224,516.
Claims priority of application No. 10-2020-0052768 (KR), filed on Apr. 29, 2020.
Prior Publication US 2021/0341658 A1, Nov. 4, 2021
Int. Cl. G02B 5/20 (2006.01); G02B 1/00 (2006.01); H01L 27/146 (2006.01)
CPC G02B 5/208 (2013.01) [G02B 1/002 (2013.01); H01L 27/14625 (2013.01)] 21 Claims
OG exemplary drawing
 
1. An optical filter, comprising:
a near-infrared absorbing layer including a first material, the first material being configured to absorb light in a first wavelength spectrum within a near-infrared wavelength spectrum,
a compensation layer adjacent to the near-infrared absorbing layer, the compensation layer including a second material different from the first material, and
a metamaterial structure spaced apart from the near-infrared absorbing layer via the compensation layer, the metamaterial structure being configured to absorb, reflect, and/or scatter light in a second wavelength spectrum at least partially overlapped with the first wavelength spectrum such that the second wavelength spectrum at least partially overlaps the near-infrared wavelength spectrum.