I use a concave tip (think some call it a hoof or well tip) for those. The concave pit in the tip holds a supply of solder and makes drag soldering across the row of pins really easy. Less risk of a blobs or bridges too I’ve found, as long as I use plenty if flux.
Yeah, that sound of sizzling and popping flux is music 🙂
When doing fine pitch SMT work, I always clean the board with toluene, or at the very least isopropyl alcohol. Then, I use a flux pen to gently wipe the pads before placing the component, tacking 1 corner while I get it centered, then tack an opposite corner before I go round the component and solder all the pins. When I’m done, I again use toluene or IPA with an acid brush to gently clean excess flux away.
A quality iron with the right tip does wonders. I’d use something north of 600 degrees F; when I’m building SMT boards at work, I use a Metcal STTC-126.
Looks clean. Personally I would prefer a bit more solder.
Looks perfect!
nice! did you drench it in flux or are you very precise? 😀
Chef’s kiss
Very neat job!
I use a concave tip (think some call it a hoof or well tip) for those. The concave pit in the tip holds a supply of solder and makes drag soldering across the row of pins really easy. Less risk of a blobs or bridges too I’ve found, as long as I use plenty if flux.
Yeah, that sound of sizzling and popping flux is music 🙂
Ez
lot of people don’t know that TQFP are easy to solder
Looks great! Keep it up!
Recommend you use a flux pen like [this](https://www.amazon.com/SRA-Soldering-Flux-Low-Solids-No-Clean/dp/B008OC0E5M). I’d make sure there’s a good “ramp” of solder from the pad to the pin. Flux will help the solder flow so you shouldn’t get any bridges; just don’t use too much solder.
When doing fine pitch SMT work, I always clean the board with toluene, or at the very least isopropyl alcohol. Then, I use a flux pen to gently wipe the pads before placing the component, tacking 1 corner while I get it centered, then tack an opposite corner before I go round the component and solder all the pins. When I’m done, I again use toluene or IPA with an acid brush to gently clean excess flux away.
A quality iron with the right tip does wonders. I’d use something north of 600 degrees F; when I’m building SMT boards at work, I use a Metcal STTC-126.
That looks really good! Aside from pin 36, I can’t see any errors!
Looks like you shorted pins 20 and 21
Looks great! You could probably even do a 48 pin QFN by hand with those skills 🙂
Edit: Pretty sure that package and breakout board were my first go at SMT hand soldering too. Good memories and an invaluable skill during school!
More flux and check for a solder bridge between pin 20, 21