PolkaDot 12 Posted May 29, 2013 Share Posted May 29, 2013 Recently had my first go at printing a board and soldering surface-mount components. It's a straight-forward breakout for an FT230XS. Technique: On the etching side, I used a 2:1 mixture of Hydrogen Peroxide solution and Muratic Acid. Initially clear, it turned a lovely neon green when the copper started reacting! Etch took maybe 5-6 minutes. I used an "ultra fine tip" Sharpie as the resist; learned the hard way that the 'Micron' brand of super fine tip pens doesn't work for this application :-( . I was struggling to mark the pads with the sharpie, so instead I drew a dark box across an entire row of pins then used a type of dental pick to scratch a fine line between adjacent pads. Seemed to work pretty well! I had bought a syringe of solder paste for the occasion, but ultimately I couldn't make it cooperate--globs kept bridging pins. Eventually I just put down solder on all the pads, put some flux on the pins and reflowed that way. Anyhow, it was a somewhat messy learning experience, but hopefully next I'll print/mount the whole module. Will keep you posted! tripwire, bluehash, Fred and 3 others 6 Quote Link to post Share on other sites
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