DJ🌞Mar 4

This was for the lapping experiment no.2. I am and will be taking images of every step e.g. when I hit a layer. This is around an hour of lapping work and ~18 hours of imaging the result. So one layer per day if I do everything well unlike yesterday, lol.

See alt text for description.

#reverseengineering

Show threadDJ🌞Mar 4
A pad structure including an array of vias to the layer below, visible here as bright dots.
Show threadDJ🌞Mar 4
Sporadically, there are more vias in groups of two. These contact the mesh on top metal.
Show threadDJ🌞Mar 4
Finally, I just like how this looks. A glimpse through three more metal layers.
Show threadDJ🌞Mar 5
Going down further, metal-3 is half gone. Here is what metal-2 and below looks like. Vias are again clearly identifiable.
Show threadDJ🌞Mar 6

Now, that one's done imaging and stitching. I've lapped it down to remove the rest of this metal layer already, imaging it comes next...

Can already tell the top array is EEPROM/Flash. A couple more memories appear to be in the bottom as well.

Show threadDJ🌞Mar 6
Now only M1 and M2 in the sea of gates..
Show threadRue Mohr
@infosecdj do we get a /layer time lapse out of this later?
Mar 6 at 11:47pmWeb
Show threadDJ🌞Mar 6
@RueNahcMohr Haha, I thought of it but I don't know how to generate such a video myself.
Show threadRue MohrMar 7
@infosecdj oh, do you have a heap of still images with logically ordered filenames?
Show threadDJ🌞Mar 7
@RueNahcMohr More like, 5 of them? Eventually 6
Show threadRue MohrMar 7
@infosecdj ok, so a fade-between effect would be in good order. Hows the alignment on them?
Show threadDJ🌞Mar 7
@RueNahcMohr I did not check that. Rotation wise they should be fine, but on translation... dunno
Show threadRue MohrMar 7
@infosecdj ok, so maybe a bit of alignment preprocessing.
Show threadDJ🌞Mar 7
@RueNahcMohr Feel free to go wild with the images in this thread :)