Ipc4556 Pdf Jun 2026

If your application involves very fine-pitch (below 0.3mm) or multiple reflow cycles, ENIG per IPC-4556 remains the gold standard—literally.

"All exposed copper pads shall have ENIG per IPC-4556A: Ni 3-6µ, Au 0.05-0.23µ, P% 7-11." ipc4556 pdf

in). Acts as a diffusion barrier between copper and surface layers. 0.05 – 0.15 m (2.0 – 12.0 If your application involves very fine-pitch (below 0

IPC-4556 is the industry standard titled ipc4556 pdf