Category: Miscellaneous Tools
Tools: Quartus® Prime / Quartus® II
Device: Cyclone® IV


The FPGA mounting surface is the Top Layer.
The Top Layer is already in the SSN Analyzer settings, so you don't need to specify it again.
The Quartus® Prime/Quartus® II Handbook has calculation formulas for each signal layer, so please refer to them for calculation.

Reference information
https://www.altera.com/en_US/pdfs/literature/hb/qts/qts-qps-5v2.pdf
(Search for Defining PCB Layers and PCB Layer Thickness.)