Chris,
      I'm not entirely sure, but I think the UV erasers might be a higher
power density than the type used for developing boards.  Hence the
safety cutouts on doors and that sort of thing.  Maybe you should try
a longer exposure.  My UV eraser has the chips placed very close
to the tube and they come out quite warm.  Much closer than in my
PCB light box.

Regards

Martin
> Hi All,
>
> I have a PIC16C64B, which is supposed to be UV erasable. I have tried sticking it under a UV lamp for 30 minutes, but there seems to be no corruption or any signs that the chip has been erased. The HEX code looks exactly as it was when I programmed it. Does anyone know how long the chip must
stay in UV light? The UV light box I am using, is actually meant for developing PCB's, but I'm have been told, it has been used to erase EPROMS.
>
> Regards
> Chris Pringle