ENIG Surface Finish

PCB manufacturers frequently use electroless nickel immersion gold (ENIG) plating because of its anticorrosion and uniform plating properties. A thin layer (0.05 to 0.23um) of gold is plated over a layer (4-7um) of nickel through a chemical process.

ADVANTAGES

  1. ENIG meets all the ROHS requirements, which makes it environmentally friendly.
  2. It ensures a flat surface of gold covering the pads, allowing for better soldering performance. Therefore it is best for fine-pitch components.
  3. Shelf life of ENIG surface finish is 12 months or more. So it offers a variety of project creations.
  4. ENIG finish boards can handle high-temperature.

ENIG Surface Finish

CONSIDERATIONS FOR ELECTROLESS NICKEL IMMERSION GOLD PLATING

The ability of ENIG plating to prevent oxidation and corrosion while enabling dependable soldering and bonding makes plating popular in the electronics industry. However, several things could reduce ENIG’s efficiency.

Nickel phosphorous occasionally develops while the electroless nickel plating procedure is being done. As a result, solder junctions become less reliable, potentially compromising performance.

The thickness of the gold layer must be considered. The maximum possible gold thickness is 5 inches or less since gold can start to corrode the nickel layer if it is kept in the bath for too long.

WHAT METALS ARE SUITABLE FOR ELECTROLESS NICKEL IMMERSION GOLD PLATING?

ENIG can cling to a variety of metal-based materials, such as:

  1. Copper
  2. Aluminum
  3. Steel
  4. Steel Stainless

 

WHY CONSIDER RUSH PCB FOR NICKEL IMMERSION GOLD PLATING?

At RUSH PCB Limited, we have years of expertise working with businesses in various demanding industries to provide complete-service finishing solutions. We take the time to comprehend the particular needs of your business and adjust our coating or finishing process as necessary. Please fill out our contact form immediately to get more information about the benefits of ENIG plating or a price.