Definition

DuPont supplies specialty materials for PCB fabrication. Key products: Pyralux flexible circuit materials (polyimide-based laminates and coverlay), Interra high-Dk laminates for embedded capacitance, and Riston photoresist films. Pyralux is the industry standard for flex circuits - AP (adhesive-based) and LF (adhesiveless) versions. DuPont's Kapton polyimide film is the base for most flex materials. Material specifications and design guides available from DuPont directly. DuPont materials are premium-priced but offer documented performance and consistent supply.