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PTH vs MH

Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Questions & Answers
Forum Description: issues and technical support
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=1718
Printed Date: 18 Nov 2024 at 6:39pm


Topic: PTH vs MH
Posted By: SteveD
Subject: PTH vs MH
Date 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.


Replies:
Posted By: Tom H
Date 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" rel="nofollow - http://www.pcblibraries.com/forum/ipc7351-padstack-naming-convention_topic36.html
 


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