Ben,
     I did this once with a board that had solid planes on the outside.
     Outr photoplot guy used a wrong aperture so the vias were not
     isolated. Since we only need about 4-5 boards and there were only
     about 10-13 vias total, one of our guys in the shop used a router type
     (donut) bit on a drill press and just drilled thru the copper. Saved
     my but.

     Pete


______________________________ Reply Separator _________________________________
Subject: [DC] Question on Plated holes
Author:  <[log in to unmask]> at Internet
Date:    1/8/98 1:13 PM


Greetings fellow designers...

A question has come up concerning the need for pads on both sides of the
board for a plated via.  We have slipped and let a via get placed under
a metalized part (big OOPS).  Now we are in the fix it phase and would
rather not take the time or money to scrap and re-layout the board.
What we would rather do is remove the pad on the top side of the board.

I have always believed the need for pads on both sides of the board is
mostly a fabrication issue to insure good/complete plating on the hole
wall (at least on vias).

My questions are:

1) What problems arise if the top pad is removed from the artwork?

2) What problems would there be if the pad was removed after
fabrication?

3) Any other suggestions.


Thanks in advance for your help and responses.

Ben Davis
[log in to unmask]

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