Post #1581477
2026-03-07 20:45 UTC
Full die with M2 and below. Some M2 started to peel on the perimeter, and a little bit of M3 remains over the sea of gates. I thought I'd rather shoot this one than keep lapping further.
Now I can ID the memory blocks at the bottom; three SRAM arrays of different sizes and a block of ROM it seems, which is the rightmost one.
Replies (1)
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@infosecdj@infosec.exchange 2026-03-08 10:26
I/O pad circuitry with only M1 remaining. Three distinct blocks are there, logic circuitry, medium-drive transistors, and tow high-drive transistors for driving the pad. For standard cells, M1 seems to be solely for power delivery and local interconnect, inter-cell routing is on M2 and higher layers. Interesting to see the substrate colour changes based on the doping type; pink and green. Pink seems to have smaller FETs on average, so I'm inclined to say this is the N-type.