ENGINEERING ANSWER
A successful prototype establishes feasibility, but production requires repeatability across lots, panels and process conditions. Preserve the material model and construction that produced the measured performance.
What to decide before release
Review changes in supplier, foil, finish, bonding system and panel format before scaling. Use pilot lots and representative coupons to detect variation. Define which substitutions require engineering approval.
Checks to put in your design brief
- Freeze the approved construction
- Track measurement distributions
- Control supplier change notices
Important distinction
A nominally identical laminate name does not ensure an unchanged finished RF stackup.
Sources & basis
Material facts follow the cited source. Design checks are preliminary guidance, not supplier process instructions.