PCB Libraries Forum : PTH vs MH https://www.PCBLibraries.com/forum/ Tue, 07 Apr 2026 05:23:34 +0000 Mon, 22 Jun 2015 16:25:43 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.07 360 https://www.PCBLibraries.com/forum/RSS_post_feed.asp?TID=1718 <![CDATA[PCB Libraries Forum]]> https://www.PCBLibraries.com/forum/forum_images/PCBLForumLogo.gif https://www.PCBLibraries.com/forum/ <![CDATA[PTH vs MH : You should probably read this...]]> https://www.PCBLibraries.com/forum/pth-vs-mh_topic1718_post7000.html#7000 Author: Tom H
Subject: 1718
Posted: 22 Jun 2015 at 4:25pm

You should probably read this Pad Stack Naming Convention:
 
http://www.pcblibraries.com/forum/ipc7351-padstack-naming-convention_topic36.html
 
]]> Mon, 22 Jun 2015 16:25:43 +0000 https://www.PCBLibraries.com/forum/pth-vs-mh_topic1718_post7000.html#7000 <![CDATA[PTH vs MH : When I am looking at the TH pad...]]> https://www.PCBLibraries.com/forum/pth-vs-mh_topic1718_post6999.html#6999 Author: SteveD
Subject: 1718
Posted: 22 Jun 2015 at 4:10pm

When I am looking at the TH pad stack for a part long after it was created, how can I tell if it was meant to be plated or not plated?  I see some MH that have a hole size and then a min size over the hole that is negative and equal to the pad radius, suggesting that it erases the pads.  I see other MH that instead have a keepout all spec.  Not all seem to have the option for adding a keepout all.  There is no box checked off for either saying plated or not.

The real problem here is that there is no written help for pad stacks at all (neither inline nor online).  Terms are not defined or ambiguous, resulting in guesswork.  I'd prefer a reference I can read than to have to keep resorting to web meetings or phone calls.


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