Definition

Resin Coated Copper (RCC) is copper foil with a thin layer of resin on one side, used in HDI build-up processes. RCC is laminated resin-side down onto the panel, creating a dielectric layer with copper ready for patterning. The thin, glass-free resin layer (typically 40-80 µm) enables small laser-drilled micro-vias. RCC simplifies the build-up process compared to using separate prepreg and foil. The resin composition affects dielectric properties and laser drilling characteristics.