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Schematic illustration of structures of burst ultra-high speed (UHS) complementary metal-oxide-semiconductor (CMOS) image sensor with on-chip memories; (a) the previously developed chip, (b) an improved structure of (a) with high density memory array, (c) a planar structure with pixel-wise high density memory array, and (d) a backside illuminated 3D stacked structure with pixel-wise interconnections.
