Digital BW, The Print

Hi Paul,

> I'm only skeptical that the filters
> aren't built as part of the chip. For sensors with big pixels, the filter
> may be separate, but the pixel pitch on a pro digicam is about 7 microns,
> and on a typical consumer camera, it's much smaller. I don't see how they
> could possibly build a separate filter, and then stick it to the IC with
> micron-level alignment. The filter would have to be thinner than the pixel
> pitch, which would make it a fraction of the thickness of ordinary plastic
> wrap.

Keep in mind, the "pro digicam" market uses interline sensors, not what are
called "full frame" sensors (like used in high end dSLRs and digital backs
for medium/large format.  So, I agree that for that market (the market that
use high volume interline sensors) as I said, they probably do deposit the
filter material on the array as you suggest.

You said before, and say again, you are "skeptical that the filters aren't
built as part of the chip".  There is no need to be "skeptical", the filters
are not "built as part of the chip" in all cases, which is all I was
pointing out.

Regards,

Austin