Re: gEDA-user: SMD soldering challenge status

[John Griessen <john_g@xxxxxxxxxx>]

Is the intent to practice iron
soldering,
or test oven bake cycles with solder paste?

DJ Delorie wrote:

> The questions are: What footprints to use for a proper "challenge"?
> We've got four each for the 0201 through 0805 parts, and I can make
> the two ICs have either long or short pads.  Plus, what about solder
> mask?  

For score and snap FR-1 board material, I've been thinking a IR reflective wide 
clearance solder mask would keep the board from heating up everywhere and 
getting to hot, but still cook where you need it.  But with a wide clearance you 
would also need a normal solder mask.

My first thought is it could be a helpful test aid if it had graduated versions 
between close to chip legs/lands sizes and oversize that let lots of solder 
cling on.  By oversize, I mean only in the direction of chip leg lengths, not
fatter.

John G

What's ideal?  Or should we make it more challenging (and
> perhaps cheaper) by not having one at all?
>
> I'm also figuring score-and-snap to separate the boards.  I can leave
> a bigger border if I go to double sided.
>
> Comments?


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