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Mail Archives: geda-user/2017/03/22/13:50:32

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From: "Peter Clifton (petercjclifton AT googlemail DOT com) [via geda-user AT delorie DOT com]" <geda-user AT delorie DOT com>
Date: Wed, 22 Mar 2017 17:49:22 +0000
Message-ID: <CAJXU7q-H7gVKW8R175tg3tkAtqAaia92NRL9u6FPnAVubxS2pw@mail.gmail.com>
Subject: Re: [geda-user] handsolder QFN packages
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Do you have paste and / or hot air?

From the datasheet, looks like the pad wraps up the side, which makes
things a little easier.

I'm guessing yield / success rate won't be perfect, but it could be
possible. My colleague suggests a really pointy soldering iron tip touching
the end of the lands (preloaded with solder paste).

It is smaller than I'd be happy doing myself, but perhaps I'm a wuss.

Peter

On 22 Mar 2017 17:29, <karl AT aspodata DOT se> wrote:

Is it possible to handsolder QFN packages, something like [1] ?

H=C3=A4lsningar,
/Karl Hammar

[1] http://assets.nexperia.com/documents/data-sheet/PUSB3FR4.pdf

-----------------------------------------------------------------------
Asp=C3=B6 Data
Lilla Asp=C3=B6 148
S-742 94 =C3=96sthammar
Sverige
0173 140 57

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<div dir=3D"auto">Do you have paste and / or hot air?<div dir=3D"auto"><br>=
</div><div dir=3D"auto">From the datasheet, looks like the pad wraps up the=
 side, which makes things a little easier.</div><div dir=3D"auto"><br></div=
><div dir=3D"auto">I&#39;m guessing yield / success rate won&#39;t be perfe=
ct, but it could be possible. My colleague suggests a really pointy solderi=
ng iron tip touching the end of the lands (preloaded with solder paste).</d=
iv><div dir=3D"auto"><br></div><div dir=3D"auto">It is smaller than I&#39;d=
 be happy doing myself, but perhaps I&#39;m a wuss.</div><div dir=3D"auto">=
<br></div><div dir=3D"auto">Peter</div></div><div class=3D"gmail_extra"><br=
><div class=3D"gmail_quote">On 22 Mar 2017 17:29,  &lt;<a href=3D"mailto:ka=
rl AT aspodata DOT se">karl AT aspodata DOT se</a>&gt; wrote:<br type=3D"attribution"><bl=
ockquote class=3D"quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc so=
lid;padding-left:1ex">Is it possible to handsolder QFN packages, something =
like [1] ?<br>
<br>
H=C3=A4lsningar,<br>
/Karl Hammar<br>
<br>
[1] <a href=3D"http://assets.nexperia.com/documents/data-sheet/PUSB3FR4.pdf=
" rel=3D"noreferrer" target=3D"_blank">http://assets.nexperia.com/<wbr>docu=
ments/data-sheet/PUSB3FR4.<wbr>pdf</a><br>
<br>
------------------------------<wbr>------------------------------<wbr>-----=
------<br>
Asp=C3=B6 Data<br>
Lilla Asp=C3=B6 148<br>
S-742 94 =C3=96sthammar<br>
Sverige<br>
0173 140 57<br>
<br>
<br>
</blockquote></div><br></div>

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