Ipc4556 Pdf -

The complete ENEPIG deposit involves three unique chemical layers plated sequentially over a clean copper substrate. IPC-4556 sets the mandatory thickness ranges for each element to balance manufacturing yield, process control, and joint longevity: Plating Layer IPC-4556 Thickness Range (Metric) IPC-4556 Thickness Range (Imperial) Primary Engineering Purpose 3.0 to 6.0 118.1 to 236.2

Supporting gold, aluminum, and copper wire bonding on a single surface. ipc4556 pdf