日本語
If you are doing something funky like hand soldering a QFN package or even doing a ceramic capacitor, does it make any sense to preheat the part prior to soldering to reduce thermal shock? Like on a hot plate. If you have aversion to hot air pencils (its easier to drag solder or use solder channels to route solder into a flat no leads IMO).
- Comments(1)
A****min
Sep 18.2019, 17:35:30
I don't think thermal shock would be much of an issue unless its a sensitive part or you are doing something strange.
Preheating is always useful if you have thick copper or large ground plane to solder to, usually not an issue with QFN but might come up with a FET/motor driver part. But then they'd usually have a center pad, which is really better to do with hot air.
Pre-soldering the pads by hand then using hot air to reflow the package is also an option.
