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Soldering QFN ICs

10/3/2013

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Picture
I had to solder one of those retched 16-pin QFN packages recently. The IC in the picture measures 3x3mm

My normal soldering iron bit, which is pretty small, would still be too large for this job.

Picture
Click to enlarge.
The top bit is an Antex 1mm bit. Pretty standard for hobby electronics use.
Next bit down is an Antex 0.5mm
Below that is my Xytronic 0.8mm that I use for 99% of my electronics work.

The bit on the right is an Antex 1107, 0.12mm bit.
You can purchase these bits from Rapid Electronics as well as other sources.

The upper piece of solder wire shown is standard 60/40 22swg wire.
The lower piece is 60/40 32swg.
Picture
Click to enlarge.
The image on the left shows the size of the 1107 bit next to the IC.

The image on the right shows the completed assembly. It's not pretty, but it works.

The black "goo" is actually flux.

Picture
Click to enlarge.
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    A software and hardware engineer who loves retro computers.

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