HyRelex TF-260 / TF-290: RF film, flexible construction and motionHyRelex TF-260 / TF-290: RF film, flexible construction andmotionSignal copperNamed coreReference planePressed bonding layerSecond coreCopperCore thickness ≠pressed bondline ≠finished board thickness³Ô¹Ïtv engineering illustration · conceptual, not a qualified stackup or measurement