> Actually, maybe it was ROM chips...but, anyways, back in ceramic casing
> days you could file away the casing and make a crude imaging array.

Dr. William Yerazunis of the Mitsubishi research center in Cambridge
Massachusetts has used this concept to develop a low cost imaging array
from dynamic RAM circuits.  These things are now in production and are
used as cheap image arrays in toys and low end devices.  They also have an
exponential response, which is useful in dealing with the large dynamic
range of brightness the human eye can interpret.


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