Ipc4556 Pdf Jun 2026

IPC-4556A (released June 2025) is the industry standard for Electroless Nickel/Electroless Palladium/Immersion Gold (ENEPIG) plating, defining requirements for soldering and wire bonding reliability . The specification outlines precise thickness ranges to prevent nickel oxidation ("black pad") and support universal assembly, including lead-free, tin-lead, and gold wire bonding . Purchase the official standard via the Accuris Standards Store at Accuris . IPC 4556A - Accuris Standards Store

This article is for informational purposes only and does not replace the official IPC-4556 document. Always refer to the latest standard for legally binding requirements.

This critical update added a maximum gold thickness of 0.070 µm. This limit prevents "hyper-corrosion" of the nickel, which can occur if the gold plating process is too aggressive or prolonged.

By introducing the palladium layer, ENEPIG effectively eliminates the hyper-corrosion of the nickel layer that frequently plagues ENIG finishes. Multifunctional Assembly: It is uniquely capable of supporting gold, aluminum, and copper wire bonding ipc4556 pdf

: Supports gold (Au), aluminum (Al), and copper (Cu) wire bonds.

Acts as a diffusion barrier preventing copper migration into the solder. 0.05 to 0.15 2.0 to 12.0

Essential for under-the-hood electronics, sensor modules, and advanced driver-assistance systems (ADAS) operating in harsh environments. IPC-4556A (released June 2025) is the industry standard

IPC-4556 - Revision A - Global Electronics Association: Store

Searching for the is a common task for engineers and procurement specialists trying to understand the intricacies of Heavy Copper Hybrid Circuits . Because IPC standards are proprietary documents, finding a legitimate free PDF can be difficult, and often leads to outdated or unauthorized copies.

is an industry specification titled "Performance Specification for Thick-Film Copper (Cu) Plating for High-Performance Applications." It was developed by IPC (Association Connecting Electronics Industries) to standardize the requirements for thick copper plating on PCBs, particularly for high-reliability sectors like aerospace, defense, medical devices, and high-power electronics. IPC 4556A - Accuris Standards Store This article

In short, IPC-4556 serves as a more robust, universal finish for demanding applications where both soldering and advanced wire bonding are required.

Providing reliable wetting for leaded and lead-free solders.