Where SMD parts are involved in assembling new boards or in repairing damaged boards, the drag soldering methode has become common practice. Sure, a microscope can help (especially when you’re done soldering and checking for bridges) but as the demo clearly shows the magic word is flux.
![](https://cdn.xingosoftware.com/elektor/images/fetch/dpr_1,w_250,h_204,c_fit/https%3A%2F%2Fwww.elektormagazine.com%2Fassets%2Fupload%2Fimages%2F17%2F20170530143522_Drag-Soldering-novid.png)
Where SMD parts are involved in assembling new boards or to repair damaged boards, the
drag soldering method is now common place. With a little practice, this rather unrefined soldering technique actually gives brilliant results, especially with terrifying quad flat packages. This video shows how to drag solder SMD parts with a high density VQFP 64 pin package, where
V stands for
very thin or
very fine pitch! Sure, a
microscope can help (especially when you’re done soldering and checking for bridges), but as the demo clearly shows the magic word is
flux.
There is a certain level of skill involved, if you have never tried it before don’t expect results this good. In reply to the viewer’s question:
Do I need anything more than a flux pen and a soldering iron? The answer is
no, just some practice… and courage
Discussion (2 comments)