Device for improved multispectral detection

Fabrication method of a multispectral detection device characterised in that it comprises the following steps:

• providing a substrate comprising first and second photodetectors each sensitive to a first wavelength range and to a second wavelength range different from the first wavelength range, the first photodetector delivering a first signal representative of a captured radiation and the second photodetector delivering a second signal representative of a captured radiation, the first wavelength range and the second wavelength range being infrared wavelength ranges,
• forming a first filter configured to allow the first wavelength range to pass and to block the second wavelength range, the first filter covering the first photodetector and leaving the second photodetector uncovered, the first filter being in contact with the first photodetector so as to block the passage of the second wavelength range in the first photodetector,
• forming a second filter arranged at a distance from the first and second photodetectors and at a distance from the first filter, the second filter being configured to allow the first wavelength range and the second wavelength range to pass, the second filter being configured to block a higher wavelength than the longest of the wavelengths in the first and second wavelength ranges and/or to block a lower wavelength than the shortest of the wavelengths in the first and second wavelength ranges.