I admire your dedication but even as someone who might attempt such a thing myself, I would say it's going to be a big PITA.
Not the drilling so much, I think that's easy with a good tool, but when you come to solder the BGA on top of those wires, you better be damn sure they won't move and short out. I really don't see how that's going to be easy, since to solder the BGA properly you will need enough heat through the board and that will likely reflow all the solder on your via wires too.
Stuff up just one and the whole thing is ruined.
Might pay to buy a BGA breakout board on eBay or something, or design your own and send it to some cheap board house.
--- In Homebrew_PCBs@yahoogroups.com, "Jeff Heiss" <jeff.heiss@...> wrote:
>
> The top of the board is etched first. There are four alignment crosses on
> the top and holes are drilled through the center of the cross. The bottom
> is aligned to the holes. I have not done the BGA vias yet since the drill
> bits are breaking but I will try to solder wires thought the board to
> connect the top and bottom. Then will I snip the wires flush between the
> BGA ball pads and solder the BGA.
>
>
>
> Jeff
>
>
>
> _____
>
> From: Homebrew_PCBs@yahoogroups.com [mailto:Homebrew_PCBs@yahoogroups.com]
> On Behalf Of Jan Kok
> Sent: Tuesday, March 12, 2013 11:28 PM
> To: Homebrew_PCBs@yahoogroups.com
> Subject: Re: [Homebrew_PCBs] drill for micro drill bits
>
>
>
>
>
> I use a Proxxon rotary tool and drill stand with #80 (.013") carbide drill
> bits, no problem. I don't have any drills smaller than that, so I can't say
> how it would work with #96.
>
> How do you align the drill with the board so you can hit your targets
> accurately? How do you get the two sides of the board registered with each
> other? And how will you create connections through the board?
>
> [Non-text portions of this message have been removed]
>
>
>
>
>
> [Non-text portions of this message have been removed]
>