Re: [EE] Intentionally delaminating a PCB

On Thu, 3 Apr 2025, Neil wrote:

> Thanks David,
>
> Have you done this or seen it done? I have the impression that once the 
> sander gets to an inner layer of copper, it would tear up that copper, 
> especially narrow traces.
>

You could "lap" it using a fine grit abrasive such as aluminium oxide or 
silicon carbide (commonly used in lapidary). Put some abrasive and water 
on a sheet of glass and rub the PCB on it. You can remove very small 
amounts of material this way.

I've used acetone to eat epoxy but it might take a while.

Regards
Sergio Masci