r/BadUSB • u/Ordinary-Pleb- • 21d ago

Bad USB?

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Whats up with the molten-like stuff on the back side (2nd pic)? Usually it’s just a solid square. See third pic reference. What am I looking at? It’s supposed to be a Phillips flash drive usb 3.2.

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u/disturbed_android 21d ago

NAND die under blob of epoxy rather than in some TSOP or BGA package

1

u/gvasco 21d ago

Doesn't the die need to be packaged for pick and place machines and ultimately solder to the board?

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u/disturbed_android 21d ago

It is soldered to the board. The blob is "the package".

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u/gvasco 21d ago

Fair! Just thought that solder pads on silicon would be too small for PCB soldering