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David,
When I was at AT&T we always suppressed the Inner layer pads
that were non-functional, at our location. They made a lot of production
product that worked flawlessly. When I changed jobs to Zenith Electronics,
the work I did was mostly low volume, test boards to support HDTV.
suppressing the inner layer pads seemed to cause problems during rework
of the PC Boards, when I did not suppress the inner layer pads the rework
problems were eliminated. So I do agree with your 2 points, it just depends
on your product type and quantity.
Karl Bates
[log in to unmask]
>I am currently debating the pro's & con's of suppressing non-functional
>inner layer pads and have found our PCB fabricators have differing views
>on which is best. Here are the 2 views.
>1. Suppressing inner layer pads will give a better drilled hole, and so
> will produce a more consistant & cleaner plated hole.
>2. NOT suppressing inner layer pads will produce a stronger & more > reliable PTH less prone to failiure.
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