Compare materials using the actual electrical, thermal and mechanical conditions. Preserve the test methods and conditioning attached to published values. The full construction includes cores, bonding layers and copper, not only a resin-family label.
Start with these questions
- Which properties determine the design margin?
- Are candidate data measured on a comparable basis?
- Which substitutions require renewed engineering approval?
Read the engineering guides
Apply a tool or checklist
What to keep in the project record
Retain the data-sheet revision and approved construction. Mark missing information as unresolved instead of treating it as evidence of equivalence.