Ccd Potential Well Charge Transfer

# CCD's Walking Potential Well vs. CMOS's Direct Address

two different answers to reading a million-point grid through a handful of pins

Backside illumination later undid CMOS's one real cost — wiring blocking light — by thinning the wafer and letting photons enter from behind it entirely.

CMOS's direct-address wiring, not a physics advantage in light capture, is what let it absorb on-chip ADC, in-pixel amplification, and eventually nearly all volume imaging.

CCD persists today only in a handful of scientific/medical niches — this is the project's first imaging-class series, beside memory and power