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US 10,483,414 B2Granted
Stack-type image sensor including meta-filter
AssigneeSamsung Electronics Co., Ltd.
InventorsSeunghoon Han, Lilong Shi, Kwanghee Lee, Changgyun Shin
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Abstract
A stack-type image sensor may include a photodiode and a meta-filter. The photodiode may include a first photodiode configured to absorb first light of a first wavelength band and a second photodiode disposed on the first photodiode and configured to absorb second light of a second wavelength band. The meta-filter may include a first meta-filter disposed in a lower portion of the first photodiode and configured to reflect the first light of the first wavelength band to the first photodiode.
Claims20
A stack-type image sensor comprising:
- a photodiode comprising:
- a first photodiode configured to absorb first light of a first wavelength band, and
- a second photodiode disposed on the first photodiode and configured to absorb second light of a second wavelength band;
- and
- a meta-filter comprising a plurality of nanostructures that satisfy a subwavelength condition, the meta-filter being configured to reflect light of a previously determined wavelength band, and to transmit light of wavelength bands other than the previously determined wavelength band,
- wherein the meta-filter further comprises a first meta-filter disposed in a lower portion of the first photodiode, the first meta-filter being configured to reflect the first light of the first wavelength band to the first photodiode.
3 more elements
A stack-type image sensor comprising:
- a first photodiode configured to absorb first light of a first wavelength band;
- a second photodiode disposed on the first photodiode and configured to absorb second light of a second wavelength band;
- and
- a meta-filter comprising a plurality of nanostructures that satisfy a subwavelength condition, the meta-filter being configured to reflect light of a previously determined wavelength band, and to transmit light of wavelength bands other than the previously determined wavelength band,
- wherein the meta-filter further comprises a first meta-filter disposed between the first photodiode and the second photodiode, the first meta-filter being configured to reflect the second light of the second wavelength band to the second photodiode and to transmit the first light of the first wavelength band.
2 more elements
Dependencies are inferred from the claim text.