DUAL-MODE IMAGE SENSOR WITH A SIGNAL-SEPARATING COLOR FILTER ARRAY, AND METHOD FOR SAME

A dual-mode image sensor (300) with a signal-separating CFA (334) includes a substrate (320) including a plurality of photodiode regions (322) and a plurality of tall spectral filters (391) having a uniform first height and for transmitting a first electromagnetic wavelength range. Each of the tall spectral filters is disposed on the substrate and aligned with a respective photodiode region. The image sensor also includes a plurality of short spectral filters (314) for transmitting one or more spectral bands within a second electromagnetic wavelength range. Each of the short spectral filters is disposed on the substrate and aligned with a respective photodiode region. The image sensor also includes a plurality of single-layer blocking filters (390) for blocking the first electromagnetic wavelength range. Each single-layer blocking filter is disposed on a respective short spectral filter. Each single-layer blocking filter and its respective short spectral filter have a combined height substantially equal to the first height.