: Indicates if the foil is untreated ( N ), stain-proofed ( P ), or has a single-sided bond treatment ( S ).
: For products requiring continued performance and extended life (e.g., communication equipment). ipc-4562 pdf
: E for electrodeposited or W for wrought (rolled). : Indicates if the foil is untreated (
(officially titled "Metal Foil for Printed Board Applications" ) is the definitive industry standard that specifies the requirements for metal foils used in the manufacturing of printed circuit boards (PCBs). Published by the IPC (Association Connecting Electronics Industries), it covers both unsupported foils and foils supported by carrier films. stain-proofed ( P )
: Ranges from standard grade (1) to high-temperature elongation (3) and annealed-wrought (7).