I'm still really new to electronics. I'm trying to get used to reading PCBs and what not. I just got a new multimeter and I wanted to test it out so I was using the continuity test on the board's copper traces. But what's really weird is it was saying that a point on the trace isn't connected to another point on the same trace. To clear up what I'm trying to say, here's a pic:
The multimeter's continuity test says the connection between A and B is open. I also measured resistance and it said it was infinite. To be sure it wasn't the multimeter I tested it on the below strips of solder and the continuity test said it was connected as it should.
So am I completely misunderstanding how these PCBs are made? Is there some kind of coating on the top of the traces that I can't see?
Thanks a lot, mikfig