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Paste Mask Rules For Thermal Pads |
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manu 
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Joined: 29 Nov 2018 Status: Offline Points: 25 |
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 Topic: Paste Mask Rules For Thermal PadsPosted: 20 Mar 2019 at 4:16am |
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Hello,
What are the exact rules for the thermal pad solder mask ? I know that it is 50% of the pad but from what size the mask is divided by 4 or more rectangles ? And what is the rule for the distance between these small rectangles? and the distance between these rectangles and the edge of the copper pad ? Thanks in advance.
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5941 |
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Posted: 20 Mar 2019 at 8:36am |
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The Thermal Tab Rules are located in the "Preferences > Rules" section of Library Expert.
You define the Thermal Tab values that are best for you to create a custom library that matches your preferences. Solder Mask Defined Thermal Pads are a new IPC-7093A standard. See this forum post - |
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5941 |
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Posted: 27 Dec 2019 at 4:19pm |
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Here is an image of the Minimum paste mask aperture spacing rules for a SON package with a Thermal Pad that intersects with a row of pins.
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