I agree with Richard. I was a firm believer in keeping them to protect the via barrels from cracking, so no way was I going to do it. Then there was a study done many years ago, (I don't remember who did it) that showed that only for very thick boards, like .120" or more, was there any benefit to leaving them in. That benefit was very small and it was not as much as you get from the Fabricator and such, for the extra space you got... That said, we pull them on all of our boards and we do class 3's all the time. One additional thing I just thought of. In the past I used a lot, (ok almost exclusively polyimide boards) and I believe that was where the benefit was a good one, but I don't remember now for sure since we don't use Polyimide here. :-]
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-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Stadem, Richard D
Sent: Tuesday, February 27, 2018 10:19 AM
To: [log in to unmask]
Subject: [External] Re: [TN] Non Functioning pads
I don't see why not, unless they are used for capacitance or antennae.
If they are NOT used for those purposes, then they should be removed for the same reason.
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Larry
Sent: Tuesday, February 27, 2018 11:12 AM
To: [log in to unmask]
Subject: [TN] Non Functioning pads
Is there any reason I cannot remove non functioning pads on the inner layers for an Class 3 PCB?
Many thanks,
Larry
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