From: Wolfgang Moser (womo_at_news.trikaliotis.net)
Date: 2008-05-16 22:56:31
Hello Michael
Michael Huth schrieb:
> you know I don't write often here, but this might be of interest.
> I got a defect VIC2 R3 from Stephan Lesch today to map the IC.
> At first I thought this can be quite complicated and may require to put
> it into the ESEM (Environmental Scanning Electron Microscope),
> but after a brief check in an optical microscope the ICs structure was
> good visible. With a good adjustment of the image plane there are
> also the layers distinguishable. At least upto the third I guess. This
> was done at about 5000x.
> The mapping images were taken at 1000x. The width of a 'conduction line'
> is about 6 micrometer.
> I took an image every 0.5 mm whereas each image shows a wier area so
> there is an overlap to put the images together.
I saw your message to forum-64 already. This is
really great work, the images are so damn sharp.
> To give you a brief idea how this looks I uploaded two images at:
> http://mail.lipsia.de/~enigma/vic2/10_5.png
> http://mail.lipsia.de/~enigma/vic2/10_6.png
>
> 10_6 is in the grid to the top of 10_5.
I also played around with these two in Photoshop.
There was a slight gap between these two instead
of the mentioned overlap as it looks to me
(judging from the structures to the right side).
Btw. I recommend using a selective smoothener to
eliminate the noise a bit (more) and get better
compression ratios.
Nevertheless a great job. I wonder, if really
someone is able to puzzle all the pieces together.
Photoshop is out of scope, when more of the tiles
are put together, at least for my machine that
does not contain enough RAM.
> So someone can read these images?
I'm not that deep into microelectronics so that
I would be really able to "read" that sort of
"schematic". On the other side it's not really
difficult to learn about construction of MOSFETs
and how interconnects are made on an IEC.
But someone needs some experience in this field
to not make too much errors on interpreting such
structures correctly.
I read about the Mifare hack/cryptanalysis to
reconstruct CRYPTO-1 and was really impressed.
Bye, Womo
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