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  1. spartangirl

    Z-axis Thermal Expansion of FR4

    IRstuff, It is in the thickness of the board that I am concerned about. Does that CTE make sense for this direction? Thanks!
  2. spartangirl

    Z-axis Thermal Expansion of FR4

    I have found a value of 4.5% CTE(Coefficient of Thermal Expansion) in the z-axis for FR4. How do I use this to figure out what the change in length would be of a PCB over a tempertaure range? Any help would be greatly appreciated.

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