Electroless Nickel or Immersion Gold (99.9 percent Gold)
▪ Usual thickness is 0.08 µm or 0.000003 inch to 0.2 µm or 0.000008 inch gold over 0.5 µm or 0.0002 inch nickel
▪ Superior resistance from corrosion
▪ Adequate for aluminum wire bonding
▪ Very Good for the use of fine pitch technology
▪ Superior ability for soldering
▪ Very good shelf life