Well, no one would do it by hand, too much chance of error. Our CAD software
and all CAM softwares will take them out automatically. Its not to get extra
traces in, the manufacturers say if they are not connected to traces they
can "float around" during lamination and be misregistered during drilling.
So, why have them at all if they don't do anything but cause problems?
(unless it's a reliability issue, thus, the discussion)


                -----Original Message-----
                From:   Bob Landman [mailto:[log in to unmask]]
                Sent:   Saturday, May 08, 1999 6:42 AM
                To:     Designer Council; Jack Olson
                Cc:     Kevin M. Fisher
                Subject:        Re:      [DC] Unconnected inner-layer pads

                Jack,

                This is news to me!  We never remove unconnected pads from
inner layers.  Why
                bother?  I suppose if density was a serious problem and you
were trying to
                squeeze an extra trace between pads, it would matter but
it's a lot of work.
                This means a lot of hand work in ECAM on the gerbers- yuk.
We don't do this nor
                do our contract designers.

                I don't know if our board vendor does this so I'm copying
this e-mail to him to
                let him respond directly to you and the forum.

                Bob Landman
                H&L



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