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Bottom Pad and Paste Mask Opening(s)

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=3622
Printed Date: 05 Mar 2026 at 6:05am


Topic: Bottom Pad and Paste Mask Opening(s)
Posted By: pcbfreedomcad
Subject: Bottom Pad and Paste Mask Opening(s)
Date Posted: 05 Mar 2026 at 3:19am
If a bottom pad of a QFN for example, has multiple paste mask openings generated from PCB Libraries, do these openings need to have rounded corners, or do the fabricators handle the issue with 90 degree corners on stencil openings automatically?

I know the bottom pad itself can have rounded corners.


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