siriushardware wrote:The key to soldering surface mount ICs with fine pitch without any specialised equipment is to tack-solder the device to just two pads on opposite corners of the device and then, do something you would never deliberately do when soldering at any other time... you flood all the pins along each side together with solder. Preferably lead-tin solder, not the modern lead-free rubbish.
Foxie wrote:This seems similar to the "drag soldering" method. I'm amazed it even works at all! I've seen some videos where they don't use solder wick, instead they just use a massive amount of paste/liquid flux and the solder naturally just flows into place without bridges. The only annoying thing is you need to clean the flux afterwards since you use so much. I think that's easier with liquid flux since you just mop it up, but it seems like it might flow away from the pads before you get a chance to solder it.
it's basically the same thing, just a bit messier yes.
Soldering on a very fine pitch isn't hard, but it can be made extremely difficult just by not having the right equipment.
apart from having a decent iron, the most important thing is having a decent flux. I personally prefer lead solder, like I'm sure most people do, but, it's bad for both your health and the environment if you are exposed to it or using it day in day out, and it's almost impossible to find in the UK now.
I personally use Amtech NC-559-V2-TF Tacky Flux, it's hard for me to get as I'm based in the UK, so I buy from a guy called Louis Rossmann, who incidentally has an amazing youtube channel for anyone interested in DIY or repairing boards, or just general soldering and tech stuff. He only works on apple stuff,as I guess that is where the money is in NYC, but if you can repair them, then you can repair anything...:https://www.youtube.com/channel/UCl2mFZoRqjw_ELax4Yisf6w
I personally am not in the same league as this guy, but for what I do, his videos alone have taught me a lot.
Own: 520STFM, 1040STE, Falcon 030, Atari Lynx (The first one with the crap paint
), Jaguar and too many x680x0 Macs to list, oh and also an Amiga 1200 (Boo!)