Rounded Corners on Thermal Tab Pattern Paste Mask
Printed From: PCB Libraries Forum
Category: PCB Footprint Expert
Forum Name: Product Suggestions
Forum Description: request new features
URL: https://www.PCBLibraries.com/forum/forum_posts.asp?TID=3159
Printed Date: 03 Nov 2025 at 4:00pm
Topic: Rounded Corners on Thermal Tab Pattern Paste Mask
Posted By: Volkmar
Subject: Rounded Corners on Thermal Tab Pattern Paste Mask
Date Posted: 25 Aug 2022 at 11:46pm
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Hi, PCB Footprint Experts generates Thermal Tab Pattern Paste Mask as Rectangle Shapes. By rounding the corners of the paste mask openings, solder paste release from the stencil is improved. That is why I would like to see rounded corners on thermal tab paste mask patterns by applying the existing Corner Rounding values. At the moment I put the radii manually on smaller sized pattern paste mask where paste release may be an issue. Still it would not hurt for large paste mask openings to also have rounded corners. Cheers, Volkmar
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Replies:
Posted By: Tom H
Date Posted: 29 Aug 2022 at 10:37pm
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The Paste Mask Aperture openings are laser cut. Even though the shape in the CAD library is rectangle, the stencil mfr. automatically rounds the corners. These Stencil Cuts are from a rectangular pad shape or Stencil Aperture Opening.  ------------- Stay connected - follow us! https://twitter.com/PCBLibraries" rel="nofollow - X - http://www.linkedin.com/company/pcb-libraries-inc-/" rel="nofollow - LinkedIn |