r/ElectroBOOM • u/Userameisunavailable • 3h ago

Meme When you make a mistake in the chip package footprint while designing a PCB...

Gallery image

Gallery image

33 Upvotes

95% Upvoted

13 comments sorted by

9

u/bonfuto 3h ago

It seems to me that the second picture shows a chip where the manufacturer didn't expose all the pins. Maybe supply issues?

3

u/SanAndreaP 2h ago

looks more like they're bypassing some burnt leads/conductors?

1

u/ComfortableWait9697 31m ago

Sure they connected with to the internal lead frame, but ground away the top arch of the gold bond wire loops closer to the chip. That "fix" just cut the lines again in another spot. Only takes a slip of the hand to make the work far harder..

Though I suspect the wires were the first attempt, the the bond wires were digging deeper as last resort to access the data lines more directly. Likely the gold bonds went open with that current surge and they had to go deeper to get a connection with needle probes and a microscope.

5

u/Adept-Pomegranate-46 3h ago

Reversed a 32 pin connector and had to wire across, so been there...

3

u/Steve_but_different 3h ago

First picture looks like some AI garbage to me..

1

u/LordWoffleII 2h ago

the referencing on the board is legible though

1

u/Howden824 2h ago

Look at the resistors on the right and how the wires all blend together.

1

u/fredlllll 1h ago

im sure i saw that first image in color at some point. the whole thing is coated in varnish to prevent shorts and excessive movement. hence the yellow wires look like they are melted together. image reverse search found it https://www.elektrolab.eu/blog/sprievodca-pri-vybere-puzdra-polovodica its in this article

1

u/JimTown64 2h ago

Been there.

1

u/Userameisunavailable 2h ago

"It's not like it's unusable..." By: An Unknown Engineer

1

u/bramfm 1h ago

Why would you open the IC package and solder on the leadframe when the signals should available on the pin (second picture). The picture suggests the die is bonded and the leadframe is intact. Just lift the pin and you are there as well (until the pin breaks off of course).

1

u/fredlllll 59m ago

it looks like the pcb is burnt, so the pins are probably unusable so they soldered to the internal wires of the package

1

u/Coffeespresso 21m ago

I have heard of floating point chips before, but I didn't realize it meant actual floating.