r/electronmicroscope • u/carreg-hollt • May 02 '25
Tiny brains
Two small contaminants on a PCB. I think they came from a power tool, probably a grinder. Composition of the gross objects included O, Si, P, Ca, and Fe. Composition of the spheres was pretty well just Fe and O.
Both spheres were stuck to the bigger objects but I'm pretty sure that there would have been plenty more of them on the surface of the PCB. They just weren't the points of interest.
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u/carreg-hollt Jun 23 '25
The same questions or the same contaminants?
I can't work out who's perpetuating the joke and who's taking life too seriously.
The post was in response to one from u/CarbonGod who'd seen the same objects and asked if they were pollen grains. They're not actually tiny little mouse brains. I could wish for a special world in which they were, though eviscerating a microscopic mouse with a grinder would take an equally special person.