As a small hardware company, we’ve benefited immensely from the myriad of tutorials others have made freely available online. In the spirit of giving back, here’s a really quick demo of how to place a 0.5mm pitch QFN40. Because of its very fine pitch and lack of leads, this can be an intimidating package to solder. With practice it becomes much easier.
Things I failed to mention in the video:
- My iron is a Weller WES51 with a long conical tip
- In this demo it was set to 700F
- My flux is MG Chemicals 8341
- My solder is a Kester Rosin Core 63/37 Leaded solder
- You can do this without a microscope, but for the sake of your back and your eyes I recommend a microscope with 5x-10x magnification for this sort of fine-pitch work.
Questions? Comments? Let us know!