Board makers use a series of baths to seed the vias and then
electroplate metal into them. A few DIY people may do it but the
chemicals are expensive and it is rather slow. I would love to be wrong
about this.
If one could find a source for low temperature solder paste it may be
possible to treat the vias with the pen and then squeegee the paste into
the holes. I am willing to give it a go with regular solder paste but
I do not expect it to work because I expect the high temperature to
cause the material deposited by the pen to fail.
3v0
--- In Homebrew_PCBs@yahoogroups.com, "leon Heller" <leon355@...> wrote:
>
> ----- Original Message -----
> From: "Daniel Howard Bryant" coloradobryant@...
> To: Homebrew_PCBs@yahoogroups.com
> Sent: Tuesday, June 09, 2009 12:26 PM
> Subject: [Homebrew_PCBs] Re: DIY conductive vias ?
>
>
> Your post got me thinking...what if you could make a putty/paste out
of a
> copper or tin powder? Then squeegee this putty/paste into the holes
(or
> perhaps inject it with a syringe) where the vias are going to be, then
> solder them?.....just tossing out some ideas.
>
>
> Why not find out what the board manufacturers use to plug vias in
pads, and
> use that? They, presumably, know what they are doing!
>
> Leon
>
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