So I have just received a piece of two-side Cu alumina plate for experiments. Purchased two 11x11cm plates on AliExpress -- the cost of ceramic PCBs is prohibitive, so I wanted to conduct some research before ordering a test batch. And here they came:
They turned out to be sheets of alumina covered with a cheap golden spray that can be peeled off by scrubbing with a fingernail. No, I am not kidding. Just a big WOW: counterfeiting THAT kind of stuff?
Best regards, Piotr
Does the film contain any copper? I'm wondering if the intent is to cut away what isn't wanted, an then fire the piece.
Joe Gwinn
Hard to say, that would require a bit of analytics and I have no access to my magic chemistry little box at the moment. The surface looks somewhere between brass and gold and is not conducting any detectable current.
A very interesting idea. But this is not compatible with any form of ceramic substrate PCB technology I know of (DBC and DPC), which involves a quite typical etching. A new game in town?
Best regards, Piotr
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