Nortel CPU and gel

[oldtimmer]

I recently acquired some Nortel CPUs. After I was finally able to remove the top cover, I find that the chip and bonding wires are encapsulated with a type of gel. I have use other type gels in the past and have seen similar to this, I am at a loss as how to remove it. I have tried paint thinner as I have used it in the past for other types of gel materials.

Any ideas on how to remove? I have added pictures to help. I have scrapped the gel into a pile on top of the chip (one on the right side).

Unfortunately they do not have gold plated pins to add to the gold recovery.

 

[leavemealone]

I would try carbeurator cleaner,gas or diesel fuel.But obviously dont get near your torch with it....or your new name will be oldburnedtimmer.lol.
Hope this helps.
Johnny

 

[butcher]

mayb use torch but keep away from the gas can

 

[meng2k7]

hi

the best thing is to incinerate first the lot. :wink:

 

[Sodbuster]

I tried to burn that gel off of an old automotive ECM. It takes alot of heat and it wants to swell up to like 5 times its normal volume. It turns white and fluffy, and tries to go airborn. Nasty sticky stuff. Burns very much like the silicone cualking in a tube. Kinda reminds me of what happens when you hit a piece of galvanized steel with a cutting torch.
I would try to find something that will disolve it.
Just a thought
Ray

 

[Juan Manuel Arcos Frank]

There are some solvent used in serigraphy to dissolve hard inks(they are 20%,30%,50% and 70%),well,this solvents are perfect gel removers.Get a little bit and try it in your gel.

I hope it helps.

Regards.

Manuel