Sony has succeeded in establishing a structure that layers the pixel section containing formations of back-illuminated structure pixels over the chip affixed with mounted circuits for signal processing, which is in place of supporting substrates used for conventional back-illuminated CMOS image sensors.

ENGADGET: Sony's new cameraphone CMOS jams bigger gear into the same space (video)

Weinberger tackled those problems by designing his chip from scratch, finding ways to split out parts of laborious signal-processing tasks and handle them in parallel.

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