Homebrew PCBs

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?

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