PCB from laptop screens

[patnor1011]

These are from dismantled laptop screens. I do have a lot of them but no way to determine value. They are not any gold mine material, they are mostly flash plated but this plating is also present under solder mask. Finger area is where most of the value will be found most likely as that is where mylars with Si chips were soldered.
These are depopulated but starting to take up space and I don't really know what to do with them. I was wondering if there are few people here who would like to get say a kilogram of these and try to recover what they can. This would probably be the best for EU based people who want to try to find out because overseas postage may simply be too expensive. You can keep what you recover since it may be very little but I would want to hear from you about what process you used and what the result will be.

 

[Yggdrasil]

These are from dismantled laptop screens. I do have a lot of them but no way to determine value. They are not any gold mine material, they are mostly flash plated but this plating is also present under solder mask. Finger area is where most of the value will be found most likely as that is where mylars with Si chips were soldered.
These are depopulated but starting to take up space and I don't really know what to do with them. I was wondering if there are few people here who would like to get say a kilogram of these and try to recover what they can. This would probably be the best for EU based people who want to try to find out because overseas postage may simply be too expensive. You can keep what you recover since it may be very little but I would want to hear from you about what process you used and what the result will be.

I have a few of these myself, just sitting in a corner waiting for me to allocate some attention to them.
The matching mylar's are cut close so they will have attention at the same time.
Not sure how to attack them though.

 

[patnor1011]

I have a few of these myself, just sitting in a corner waiting for me to allocate some attention to them.
The matching mylar's are cut close so they will have attention at the same time.
Not sure how to attack them though.

I did not keep mylars which was probably mistake as they are soldered with method which use tiny microscopic gold balls but I kept that Si chip as same method was used on fusing them on that mylar I got about a kilo of them if not more.

 

[Yggdrasil]

These are from dismantled laptop screens. I do have a lot of them but no way to determine value. They are not any gold mine material, they are mostly flash plated but this plating is also present under solder mask. Finger area is where most of the value will be found most likely as that is where mylars with Si chips were soldered.
These are depopulated but starting to take up space and I don't really know what to do with them. I was wondering if there are few people here who would like to get say a kilogram of these and try to recover what they can. This would probably be the best for EU based people who want to try to find out because overseas postage may simply be too expensive. You can keep what you recover since it may be very little but I would want to hear from you about what process you used and what the result will be.

I have done no depopulating what so ever on these.
Maybe put one in a 20% NaOH solution for long term leach of Solder plus destroying the Solder mask?
Or maybe these are good for Owltech's Lead bath?

 

[canedane]

Maybe put one in a 20% NaOH solution for long term leach of Solder plus destroying the Solder mask?

I did that with sound blaster pc boards with luck. The chips was manuel removed before the NaOH bath.
But not mutch gold on a flash plated board, i wont do it again.
Henrik

 

[haveagojoe]

With these I don't try to remove the solder and solder mask, I just use scissors to cut off the parts where gold flashing is visibly exposed and process those parts in Copper Chloride as normal, discarding the rest. The foils are sometimes slow to release, I think they must be bonded slightly differently.