Can traces on a CPU be repairable?

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William Felix

Joined May 18, 2018
1
I'm trying to do this to my PS3 that i love so much. Unfortunately like 3 months ago i tryed to delid the IHS on top of the CPU and i did de lid the sucker but i ended up messing up the CPU. I need to know if it's even possible to repair it? I scrapped all of green protective layer on top of the traces in that one area where the damage is and but one thing i don't get is how are the traces connected to? Like i don't see where the trace goes to. I'll show you a pic that way you get to see what i'm talking about. Like the way i see it is that the traces start where the dye is then they go alll the way to the corners but that's where i'm like ?????? How can i repair it?

https://imgur.com/C7qXHO6
 

WBahn

Joined Mar 31, 2012
32,823
I'm trying to do this to my PS3 that i love so much.
Obviously you didn't love it THAT much!

Unfortunately like 3 months ago i tryed to delid the IHS on top of the CPU and i did de lid the sucker but i ended up messing up the CPU. I need to know if it's even possible to repair it? I scrapped all of green protective layer on top of the traces in that one area where the damage is and but one thing i don't get is how are the traces connected to? Like i don't see where the trace goes to. I'll show you a pic that way you get to see what i'm talking about. Like the way i see it is that the traces start where the dye is then they go alll the way to the corners but that's where i'm like ?????? How can i repair it?
I can't tell how it is bonded. It's probably either chip-on-board in which case there are very fine wires (think dog hair) or the chip is bump-bonded meaning that the connections are underneath the chip.

If looks like you have a lot of damage on that chip carrier (if that's what it is).

It's also quite possible that in delidding it you damaged the IC itself.

This is not the kind of abuse to which you subject the things that you love so much.
 

danadak

Joined Mar 10, 2018
4,057
Delidding package exposes die to water/humidity.

Even worse is potential salts contamination from hands/fingers. Totally mess
up threshold voltages on die.

Regards, Dana.
 

Papabravo

Joined Feb 24, 2006
22,082
Maybe if you purchase millions of dollars in fabrication and assembly equipment. At that point you could probably make better chips than the ones in the PS3.
 

dl324

Joined Mar 30, 2015
18,326
Maybe if you purchase millions of dollars in fabrication and assembly equipment. At that point you could probably make better chips than the ones in the PS3.
Last I heard, the cost to participate in that business was north of $5B. Then you need to keep it running near capacity for it to be profitable. CPU designs at my company were running around a few $100M.

Mask sets were costing millions of dollars.
 

dl324

Joined Mar 30, 2015
18,326
Delidding package exposes die to water/humidity.
Not really. Ultra small compute form factors run at sufficiently low power that they don't need the IHS.

Overclockers claim they can get temps down by a few degrees by removing the IHS and using their favorite cooling method.

This Wiki article claims AMD soldered the IHS to the CPU, so removal resulted in destruction of the CPU.

EDIT: Apparently some Intel CPUs also had soldered IHS.
https://wccftech.com/intels-core-x-...-using-soldered-integrated-heat-spreader-ihs/
 
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