Dual-Mode Image Sensor With A Signal-Separating Color Filter Array, And Method For Same

A method for fabricating a signal-separating color filter array (CFA), the method comprising:

• forming a multi-height CFA on a substrate, the multi-height CFA comprising a plurality of short spectral filters and a plurality of tall spectral filters, each tall spectral filter being taller than any short spectral filter;
• disposing a spectral-blocking layer on the multi-height CFA;
• and
• planarizing the spectral-blocking layer to expose a top surface of each of the plurality of tall spectral filters.

A signal-separating color filter array (CFA) comprising:

• a plurality of tall spectral filters disposed on a substrate and having a uniform first height, the plurality of tall spectral filters for transmitting a first electromagnetic wavelength range;
• a plurality of short spectral filters disposed on the substrate, the plurality of short spectral filters for transmitting one or more spectral bands within a second electromagnetic wavelength range;
• and
• a plurality of single-layer blocking filters for blocking the first electromagnetic wavelength range, each of the plurality of single-layer blocking filters disposed on a respective one of the plurality of short spectral filters, each single-layer blocking filter and its respective short spectral filter having combined height substantially equal to the first height.