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Success! actually decapping a chip with a fiber laser. 12
Success! actually decapping a chip with a fiber laser.
Success! actually decapping a chip with a fiber laser. from electronics
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Y’all enjoyed the one I posted before, but it was kind of a letdown. So, I went and did some testing ([full vid if you want it](https://www.youtube.com/watch?v=GTG1iSd_3Vw)). Ultimately I did it! The first chip you see here gave me hope, then the 2nd gave me results. This is after a few different tries.
The laser is a 20 watt fiber laser. Ultimately I found that just going slow and weak got the best results. It makes obvious sense though, right?
R/hardwaregore
Dude I need to get one of these fiber lasers! If I only had $108K USD for the 4kw one.
That’s cool as hell and now I’m curious, what’s the material it’s eating away?
Daddy likey.
Why would you want to do this?
You might get better results with lapping the top to a much flatter surface without the markings to interfere, it was a bit chunky by the time you got down to the die.
did the chip live after the decap? I’d love to know what hardware you used as it would be a great option for those pesky copper bondwires
*edit, just saw your vid
on the arduino: you had this perfect with the first laser run what you were seeing left is glass debris from the encapsulating plastic sitting on the top glass glass (the “passivation layer” of the chip.. you can sonicate this to clear it up unless you melted the spheres to the glass surface, but then you burned through entirely.. i suspect the chip was dead..
on the iphone screen: you decapped a multi-chip carrier with two flip-chips.. your looking at silicon in this case with no active elements visible, theyre on the other side of the chip
graphics card: flip chip also.. you were etching through the bulk silicon on the back side of the chip
in the xbox controller: good decap, a fast wash in sulfuric will clean it up, the big hexagon area you see is an inductor from a hybrid chip with analog and digital elements (common in wifi/bluetooth/chipcon chips
I miss doing this as part of performing failure analysis
Now only if you could re-cap it with a laser. That would be badass!!!
You know about fuming nitric?
That’s the tightest shit I’ve seen all day.