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Mail Archives: geda-user/2017/03/22/14:41:22

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From: "Evan Foss (evanfoss AT gmail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Wed, 22 Mar 2017 14:40:10 -0400
Message-ID: <CAM2RGhStxuc8ZN42N-FeEiZMi0pncWR-UVQcijZL8SNWpuonZA@mail.gmail.com>
Subject: Re: [geda-user] handsolder QFN packages
To: gEDA users mailing list <geda-user AT delorie DOT com>
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On Wed, Mar 22, 2017 at 2:27 PM, DJ Delorie <dj AT delorie DOT com> wrote:
>
> I've done bottom-only QFNs with a hotplate and by hand; the trick is to
> design the footprint so that the pads extend out past the edge of the
> part far enough to get your soldering iron in there.  Use extra solder
> (or put paste on the pcb and reflow with your iron) and use the extended
> pads to drag the excess solder away from the part.
>
> I think the best approach with an iron is to put paste down, then the
> part, hold it in place with some sort of "third hand" (tape or a
> weight), and use the iron to reflow the paste.
>
> And I can't find a photo online of what I'm talking about, so:
> http://www.delorie.com/pcb/soldering-tricks/

Have you done any with exposed center pad?

-- 
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