FA can yield interesting photos

I thought these Failure Analysis (FA) electron microscopy photographs in IEEE Spectrum were pretty cool:

https://spectrum.ieee.org/the-art-of-failure

This one kinda reminds me of a bath mat I used to have :)  Not sure what these structures are, maybe power and ground connections ?

Best Regards,
Chuck, WB9KZY
http://wb9kzy.com/ham.htm