Article: 77935
Subject: Re: Microscope examination of a PLD
From: Eric Smith <eric-no-spam-for-me@brouhaha.com>
Date: 22 Jan 2005 15:27:13 -0800
Links: << >> << T >> << A >>
"logjam" <grant@cmosxray.com> writes:
> Anyone here ever "shave" a chip for examination?
Two friends and I read a bipolar PROM optically. It was interesting
to view it under the microscope. I'd heard that there was a long-term
problem with regrowth of the fuses, but we were actually able to see it.
Also, Peter Monta optically extracted the contents of three 2560-bit
PMOS masked ROM chips circa 1973, in order to run the code on my
simulator:
http://www.pmonta.com/calculators/hp-35/