I highly recommend using a normal SMD 10pF to 100pF ceramic capacitor, depending on frequency. They’re already used on the board, and tend to be cheaper than zero-ohm resistors, as we buy them by the bazillion rather than the handful.
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#PCB Design
We would like to do wave soldering for the through hole components. All through hole components are top side of PCB. Only test points, which require mask during process, are on the bottom side. So there is a extra labour cost at adding and removing the mask. Can we do wave solder the through hole parts without masking it?
This month we plan to find a proper suppliers to produce PCB for our new products, a healthcare watch. One of our supplier assessment items is about production equipment, which I know few about them. Can you share some common equipment which professional factory may use?
I am prototyping a PCB, using Chip Quik’s “SMDSWLF.031, a Sn96.5/ Ag3.0/ Cu0.5 solder with 2.2% no-clean flux. I find that the black spots appears frequently in larger pads on my board. I wonder if it is because I left the soldering iron more time heating the solder and that burnt the flux. What is that black residue? Is that a sign of a bad joint or maybe bad soldering technique?
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