STACKED FILTER AND IMAGE SENSOR CONTAINING THE SAME

摘要

A stacked filter for an image sensor including an infrared (IR) pixel is provided. The stacked filter includes a first filter layer disposed at the IR pixel. The first filter layer allows light with wavelengths of a first band to be transmitted through. The stacked filter further includes a second filter layer stacked with the first filter layer. The second filter layer allows light with wavelengths of a second band to be transmitted through. The first band partially overlaps the second band at wavelengths of a third band. The third band is narrower than the first band and the second band. The stacked filter allows light with the wavelengths of the third band to be transmitted through. Furthermore, an image sensor containing a stacked filter is also provided.

主权项

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.