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The way of multilayer PCB connecting

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I do not know how 2 sides are connected, I see on some PCBs there are some circular end points, so it must be going to other side. But how is it connected ?

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Jul 14 at 22:50
Enrico Gensale

I've successfully done etched double-sided PCBs using toner transfer paper. This is not easy. Aligning it is a pain, but I recommend that you get some Kapton tape

Jul 25 at 08:02
mikenaly

A method I used before I got some more professional gear was to use a laser printer and clear printable foil. As the laser printer isn't able to print it dark enough on a single foil I used two for every side.

Sep 6 at 02:46
Steina
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