Patent ID: 9666620
Date: 2017-05-30
CPC Classifications: G02B,H01L

Claim:
1. A stacked filter for an image sensor including an infrared (IR) pixel, comprising: a first filter layer disposed at the IR pixel, allowing light with wavelengths of a first band to be transmitted through; and a second filter layer stacked with the first filter layer, allowing light with wavelengths of a second band to be transmitted through, wherein a portion of the second band is lower than the first band, the first band partially overlaps the second band at a third band, the third band is narrower than the first band and the second band, and the stacked filter allows light with the wavelengths of the third band to be transmitted through, and the first band is from a first wavelength to a second wavelength, the second band is from a third wavelength to a fourth wavelength, and the third band is from the first wavelength to the fourth wavelength.