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Rounded Corners on Thermal Tab Pattern Paste Mask

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Volkmar View Drop Down
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Post Options Post Options   Thanks (1) Thanks(1)   Quote Volkmar Quote  Post ReplyReply Direct Link To This Post Topic: Rounded Corners on Thermal Tab Pattern Paste Mask
    Posted: 25 Aug 2022 at 11:46pm
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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Tom H View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tom H Quote  Post ReplyReply Direct Link To This Post Posted: 29 Aug 2022 at 10:37pm
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. 


 
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