ISIG process

Immersion silver and semi-autocatalytic gold plating

Umicores´ silver and gold plating process (ISIG) provides customers a high performance nickel-free coating which meets most of the common assembly requirements like multiple solderability and bondability with aluminium and gold wire even by existing thermal ageing stress before assembly.

Due to its outstanding film characteristics ISIG deposition is very well suited to withstand the higher requirements of PCB designer concerning fine pattern ability and high frequency signal transfer in combination with complying newest RoHs and WEEE regulations.


  • Nickel free coating
  • High conductivity
  • Thin and very uniform electroless desposition
  • Suitable for (ultra) fine pitch layouts
  • Ductile final finish compatible for flex PCB
  • Dense and homogenous gold protection layer up to 0.3 μm feasible
  • Reliable Pb-free and Sn/Pb soldering
  • Excellent Al- and Au-wire bondability


  • Flexboard PCB (FPC)
  • Medical technology
  • High frequency technology

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Questions about the product?

Markus Legeler

+49 7171 607 204

For inquiries and additional information
please contact

Umicore AG & Co. KG
Rodenbacher Chaussee 4
63457 Hanau-Wolfgang

Tel.: +49 (6181) 59 6005
Fax: +49 (6181) 59 2970

The information and statements contained herein are provided free of charge. They are believed to be accurate at the time of publication, but Umicore makes no warranty with respect thereto, including but not limited to any results to be obtained or the infringement of any proprietary rights. Use or application of such information or statements is at the user´s sole discretion, without any liability on the part of Umicore. Nothing herein shall be construed as a license or recommendation for use, which infringes upon any proprietary rights. All sales are subject to Umicore´s General Conditions of Sale and Delivery.