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Subject: Re: [geda-user] Cheapest solution for 100 pin tqfp processor
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Date: Tue, 27 Jun 2017 20:40:47 -0500
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Rob Butts wrote:
> I am very pessimistic that my tech can air solder this.

I would not worry so much over a tqfp.  Even if the pitch is 0.5mm.

Like the others said, have your tech use flux for one thing.

Consider asking them to use a dissection probe or small screwdriver to
hold the top of the package down with plenty of controlled friction, and use an iron to wipe the
solder and if needed nudge misaligned leads.  After one side is soldered, have them
look at the far side and solder it next with any needed pushing to align.  the legs of the first side
can bend a little bit to allow a perfect alignment of the far side.  The remaining two sides are all lined up
and just need a quick pass of the iron to solder.