Thin polymer CPUs - TCP (Tape Carrier Package)

[haveagojoe]

I have 4 of these interesting-looking chips which are from 90s Compaq laptops, they are on a thin polymer substrate which is similar to ribbon connectors. Two are labelled TT233 SL28Q, one I can't read and one has the markings covered with foil.
Would I be correct to assume that the gold on the tracing is plated onto a copper layer and should therefore go into a copper chloride leach, or should they go straight to AR?

 

[Martijn]

I would toss one in AR and watch how it goes.
Let us know if you have a result.