Homebrew PCBs

Hi guys,

Toavoid use of chemicals, could it to possible to activate the holes with cured silver paste and then use copper electro-plating to get PTH ?

Mike

--- On Tue, 6/9/09, a3v03v0 <a3v03v0@...> wrote:

From: a3v03v0 <a3v03v0@...>
Subject: [Homebrew_PCBs] Re: DIY conductive vias ?
To: Homebrew_PCBs@yahoogroups.com
Date: Tuesday, June 9, 2009, 12:37 PM











    
            
            


      
      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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