On 12/14/2015 7:43 PM, Dave McGuire via vcf-midatlantic wrote:
On 12/14/2015 07:41 PM, Mike Loewen via vcf-midatlantic wrote:
Yeah 300F was completely wrong, I was mixing baking floppies up with baking EPROMS after x-ray (not UV!) based erasure (which really does need 300F). Can you tell me more about this? Does baking somehow address the problem of surface state creation during X-ray erasure?
(I type this with a glance at a stack of trays containing several thousand non-windowed EPROM-based microcontrollers, and another glance over at my X-ray machine..) You forgot to mention your electron microscope. Can an electron beam erase EPROMs nondestructively??
-Dave
I know a UV laser can, but you need to live-decap (i.e. decap without damaging the die or bond wires) the chip first. This is used by security researchers to unset security bits etc on microcontrollers. -- Jonathan Gevaryahu jgevaryahu@gmail.com jgevaryahu@hotmail.com