Pdf: Ipc-4562

– You can purchase or download the standard directly from IPC: https://www.ipc.org/standard/ipc-4562

(High Temperature Elongation or HTE) is widely used for multilayer board cores and laminates to resist cracking during thermal cycles. Thickness Tolerances : The standard allows for a maximum of 10% reduction in the nominal base copper thickness. For instance, a foil may have a minimum acceptable thickness of Surface Treatments ipc-4562 pdf

For manufacturers of flat cables, adherence to IPC-4562 ensures that the foil can withstand repeated flexing and thermal cycling without micro-cracking. – You can purchase or download the standard