Patent ID: 7470946

Claim:
A triple-junction complementary metal-oxide semiconductor (CMOS) filterless color imager cell, the imager cell comprising: a bulk n-doped silicon (Si) substrate; a photodiode set including a first, second, and third photodiode formed as a triple-junction structure in the Si substrate and including four diffusion layers as follows the first photodiode forming a pn junction from a first n+-doped region at the Si substrate top surface, to an underlying p-doped region; the second photodiode forming a pn junction from the p-doped region to an underlying second n-doped region; the third photodiode forming a pn junction from the second n-doped region to the underlying p-doped well (p-well), which overlies the n-doped Si substrate; and, a transistor set connected to the photodiode set, and detecting an independent output signal for each photodiode.