Article ID: 000084484 Content Type: Troubleshooting Last Reviewed: 03/25/2013

Why should the QFN 148-pin package be used for thin PCB applications only?

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Description

The QFN 148-pin package was is designed for use in thin PCB applications only (0.8 mm or 32 mils) and it should not be used with PCBs above 0.8-mm or 32-mils thick due to the differences in coefficients of thermal expansion between the PCB and the package. 

Long-term reliability of the solder joints on the QFN package may be reduced with thicker PCBs due to effects of thermal cycling

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