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Thermal Pad Issue

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=3541
Printed Date: 15 Sep 2025 at 6:03am


Topic: Thermal Pad Issue
Posted By: m.elsayed
Subject: Thermal Pad Issue
Date Posted: 14 Sep 2025 at 5:56pm
I can adjust Thermal Pad by this parameter, but when open in Altium gives wrong value.

Can have more explain how to adjust this?

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uploads/11979/exposed_pad_paste_mask=-3.2_same_as_size.jpg" rel="nofollow - uploads/11979/exposed_pad_paste_mask=-3.2_same_as_size.jpg

uploads/11979/ep.fpx" rel="nofollow - uploads/11979/ep.fpx



Replies:
Posted By: Tom H
Date Posted: 14 Sep 2025 at 6:15pm
80% Paste Mask Reduction will not give you a Checker Board Pattern. 

80% Paste Mask Reduction will provide a single paste mask aperture. 

70% is the highest Paste Mask Reduction to generate a Checker Board Pattern. 



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Posted By: m.elsayed
Date Posted: 14 Sep 2025 at 9:48pm
 i have attached fpx, can please we have explain on it , 
if 80% not applicable why tool not block user , rather than get wrong values, please add more details for this point, when apply 70 % what values should appears in Altium


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