#3 QFN and DFN IC Packages - Description and Soldering Rework

[@user-xlario]

Thanks for this video! I'm not an expert on RF at all, but love it and I'm curious: why are these small squares in two rows near the output of the switch? An why the is a single strip of these squares near the left input but not on the right? I guess them are to adapt impedances, but I've not found yet a book that explains it.

[@mbaker335]

I am wondering why you are trying to clean up the pads with dry wick. A god dollop of liquid flux and the whole process takes seconds. You need liquid flux to get wick to work at all. It got quite painful to watch.

[@rfstuff5205]

I’m sorry for the pain that this video you voluntarily watched has caused you. I agree that using additional liquid flux would be a good way to quickly clean and prepare the area. I’ll try that sometime. However, solder wick is impregnated with rosin-based flux, so saying that you “need to add flux for it to work at all” is not accurate.