In article BAx4k.4229$Mu.1821@trndny07, Marvin says...

From the site: " However, compared to conventional
front-illuminated structures, back-illuminated structures
commonly causes problems such as noise, dark current,
defective pixels and color mixture that lead to image
degradation and also cause a decrease in the signal-to-noise
ratio." There's your answer.

Why would a gain in sensitivity by a factor of 3 produce higher noise
levels? Doesn't make sense.

Spectral efficiency of standard front-illuminated sensors is less than
30%, while it's close to 100% for back-illuminated sensors.
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Alfred Molon
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