"Slater" wrote in message ...

Is it possible to damage an EPROM by exposing it to UV light for too
long? What if a portion of the EPROM stays unprogrammed ('FF') and the
chip goes through some program-erase cycles? The unprogrammed area
should fail sooner or later, shouldn't it?

I left some 25C64's In my manually controlled (that is, no timer) UV
eraser for a couple of weeks, when I forgot to turn it off. They all still
programmed and worked fine.

--
Lee K. Gleason N5ZMR
Control-G Consultants