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QFN Thermal Tab Paste Mask % |
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jnbrown 
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Joined: 13 Jan 2020 Status: Offline Points: 40 |
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 Topic: QFN Thermal Tab Paste Mask %Posted: 15 Jan 2020 at 11:09am |
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What is a good default value to use for QFN Thermal Tab Paste Mask %?
I asked our contract manufacturer and they me to use the recommendation on the manufacturers data sheet, however most manufacturers do not specify this. |
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Tom H
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Joined: 05 Jan 2012 Location: San Diego, CA Status: Offline Points: 5718 |
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Posted: 15 Jan 2020 at 11:20am |
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Library Expert defaults to 50% paste mask reduction in the "Rules" tab.
IPC says the range of Paste Mask Reduction should be 40% - 60%. Less than 40% is not enough and greater than 60% is too much. |
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