--- Andreas W <[EMAIL PROTECTED]> wrote:
> AFAIK, the problem of making large CMOS sensors
> isn't in technology, but in
> economy. CMOS sensors, like all silicon chips, are
> manufactured in units
> called wafers, and the problem is that there will
> always be a percentage of
> the chips on each wafer that will become useless
> becuse of dust and other
> contaminations.
But you don't consider that so far mainly CCDs have
been used for professional digital cameras. CMOS,
despite the size, have many advantages over CCDs. To
name just a few:
1) Easier driving and A/D circuitry
2) Consumes less power
3) Only small modification necessary to use exsisting
plants while CMOS needs special plants. This is a
HUUGGE cost factor, especially with the short
life-time of electronics
4) Needs only one or two voltages compared to 3-6 for
CCD
5) High level of integration which allows to do
certain functions right on the imager
6) Easier scalable -> higher resolution
7) No blooming
8) Higher sensitivity
9) non-destructive read-out
10) random access. I am not sure but I think that
might make it possible that despite defects on the
chip the imager still can be used. The defect pixels
are then just interpolated. That increases the yield A
LOT!!!!
11) etc etc.
Robert
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