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Subject: Re: [Homebrew_PCBs] Soldering a LQFP 48 on a home made PCB

From: James <bitsyboffin@...>
Date: 2014-11-08

No I didn't.  I very seldom bother to tin SMD pads.  You must need to be sure the pads are clean, bare copper is fine as long as it's clean, and your flux is good.

For IC's, as I said, pads a bit longer than usual (same goes for all SMD components when hand soldering) bare clean copper, align IC, liberal flux, tack a corner or two, and run along the rest with the iron.

For smaller 2-3 pin devices, put solder on one pad only, hold the iron there on the edge of the pad with molten solder and use it as an end-stop to push the device up against, remove iron, wait for solder to solidify, now just solder the remaining pad(s).


On Sat, Nov 8, 2014 at 5:37 AM, Dwayne Reid dwayner@... [Homebrew_PCBs] <Homebrew_PCBs@yahoogroups.com> wrote:
 

The problem with all of the suggestions made so far is that everyone isassuming that the pads already have solder on them