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April 6, 2011
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Tutorial - Solder Paste Stenciling
about 4 years ago
Nice tutorial, I’ve been a big fan of SMD (and soldering paste) since I broke my first drill bits ;-)
Please note that we’ve advanced 5 years since this was written. We are not allowed to use soldering paste that contains lead anymore - except for some very special stuff for medical life saving and alike equipment.
One tip for replacing broken SMD chips that have SO-8 style pins (the chips that look like squashed bugs with legs spread out wide): Remove the old chip using a hot air gun, clean the pads and place the new chip. Now solder with normal soldering wire and a normal iron. Don’t mind that you are soldering all pins together. Now use desoldering wire and run over the pins again with your soldering iron - this will remove the soldering wire between the pins but not between pins and pads.
You can also solder pin by pin with a very fine iron and thin wire (we call this stuff monkey hair) but that takes a lot of experience, time and (but not too much!) coffee. Some extra flux helps (I use a flux pen, resembles a thick marker but with flux instead of ink).
And please use gloves when handling soldering paste. This stuff is not healthy!!!
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