Homebrew PCBs

On Wed, 16 Dec 2009 09:46:44 CST, you wrote:

>The big boys use some kind of through-hole plating... solder should work

Just solder making the connection between layers is not a good idea.
If the connection is from a trace to a pit (what would be a blind via,
not all the way through), I'd use a wire and solder it.  

If the connection is through a board (full via) connecting top and
bottom layers, solder is not the way to go.  There's no way to
guarantee that the solder flows down into the hole and makes the
connection.  

Wires can be a very good connection method, if there are no plated
through holes.  The solder that helps hold them in place can wick down
the  wire, but is not the prime connection.

Harvey

>-----Original Message-----
>Date: Tuesday, December 15, 2009 11:26 pm
>To: Homebrew_PCBs@yahoogroups.com
>Subject: Re: [Homebrew_PCBs] 4 Layer boards
>From: "Piers Goodhew" <piers@...>
>
>Not that I have the remotest plan to make a 4-layer board, but with the
>epoxy sandwich method, how do you get any electrical connection between
>either side of the fibre glass cloth?
>
>PG
>